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Biology MCQs

Biology MCQs For Entry Test

In this article, we are going to give you the Biology MCQs For Entry Test, These are the Biology Mcqs that are collected from various sources such as NTS Past papers, FPSC past papers, and entrance test of medical universities. These Biology MCQs For Entry Test will help the students to get higher marks in biology the subject.

Biology MCQs

Biology MCQs For Entry Test

1. The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called________?

A. Environmental biology
B. Social biology
C. Human biology
D. Both b and c

2. The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by________?

A. Environmental biologist
B. Paleontologist
C. Marine biologist
D. Social biologist

3. Group of living organisms of the same species living in the same place at the same time is called________?

A. Community
B. Population
C. Ecosystem
D. Biome

4. Control of organisms by using living organisms is called_______?

A. Bioremediation
B. Integrated disease management
C. Antisepsis
D. Biological control

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5. Which one is a micro-molecule__________?

A. Polysaccharide
B. Protein
C. Hemoglobin
D. ATP

6. Unbroken series of organisms arranged from ancestor to descendant sequence is____________?

A. Biodiversity
B. Phyletic lineage
C. Connecting link
D. Evolutionary line

7. Out of 92 naturally occurring chemical elements how many are considered as bio-elements__________?

A.  6
B. 16
C. 26
D. 15

8. A large regional community primarily determined by climate is called__________?

A. Population
B. Community
C. Biome
D. Habitat

9. Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called________________?

A. Molecular biology
B. Physiology
C. Biochemistry
D. Atomic biology

10. A structure formed by groups of similar cells organized into loose sheetsor bundles performing similar functions is called as________?

A. An organ
B. An organism
C. A Tissue
D. A Cell

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11. Oxygen accounts for __________ percent of totals human body mass?

A. 65%
B. 18%
C. 10%
D. 3%

12. Out of total organisms on earth, _____________are vascular plants?

A. 53.10%
B. 19.90%
C. 17.60%
D. 9.40%

13. Breakdown of large molecules into smaller ones utilizing water molecules is_________?

A. Hydration
B. Hydrolysis
C. Dehydration synthesis
D. Electrolysis

14. Intake of liquid material by cell membrane is called___________?

A. Endocytosis
B. Exocytosis
C. Phagocytosis
D. Pinocytosis

15. Which one is not correct for a productive theory________?

A. It is predictive
B. It has explanatory power
C. It discourages suggestion of different hypotheses
D. None of these

16. ___________ is concerned with cell secretions?

A. Endoplasmic reticulum
B. Golgi complex
C. Lysosomes
D. Cell membrane

17. Sythetic insulin from pork was formed by which technique__________?

A. Parasitology
B. Social biological techniques
C. Biotechnology
D. Both a and c

18. Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of_________?

A. Microtubules
B. Microfilaments
C. Intermediate filaments
D. None of these

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19. ___________ is used to relieve one kind of headache, migraine?

A. Pencillin
B. Lovastatin
C. Cyclosporine
D. Ergotin

20. Bacteria which grow either in the presence or absence of oxygen___________?

A. Aerobic bacteria
B. Anaerobic bacteria
C. Facultative bacteria
D. Microaerophilic

21. Which are the four most abundant elements in living cells?

A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium

22. Which one is not correct for a productive theory?

A. It is predictive
B. It has explanatory power
C. It discourages suggestion of different hypotheses
D. None of these

23. Conclusion of Mendels work latter became a_____________?

A. Scientific hypothesis
B. Theory
C. Scientific law
D. Productive theory

24. Starch is converted into maltose by?

A. diastase
B. invertase
C. maltase
D. amylase

25. Breeders have developed new and better varieties of food items by using which technique?

A. Pasteurization
B. Hydroponic culture technique
C. Genetic engineering
D. Biological control techniques

26. Co-enzyme is often formed from?

A. lipid
B. protein
C. inorganic ion
D. vitamin

27. Production of genetically identical copies of organisms/cells by asexual reproduction is called?

A. Mitosis
B. Replication
C. Cloning
D. Biological control

28. Messenger RNA is formed in_________?

A. nucleus
B. chloroplast
C.  mitochondria
D.  none of these

29. Astronauts may use which technique to grow fruits and vegetables?

A. Tissue culture techniques
B. Cloning
C. Pasterisation
D. Hydroponic culture technique

30. Number of chromosomes in E.coli?

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A. 1
B. 2
C. 4
D. 6

31. Which statement is incorrect for pasteurization?

A. It is used to preserve yogurt and milk
B. It was developed by Louis Pasteur.
C. It involves heating the substance at high temperature for just few sec.
D. It can be used to preserve vegetables and meat.

32. Protein factory is___________?

A. nucleus
B. ribosome
C. golgi complex
D. centriole

33. What is the mode of transmission of Hepatitis virus?

A. Aerosol
B. Parental (via blood)
C. Skin penetration
D. Unknown

34. Smallest disease causing agents in plants are?

A. virion
B. mycoplasma
C. viroids
D. prions

35. Which disease can be controlled by vaccination?

A. Measles
B. Cancer
C. Diabetes
D. Heart attack

36. The major cell infected by the HIV is lymphocyte?

A. helper-T
B. B
C. both T and B
D. none of these

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37. Vaccine was first developed by_______________?

A. Louis Pasture
B. Edward Jenner
C. Jaber Ibn Hayan
D. Aristotle

38. Pigment present in red algae is_____________?

A.  fucoxanthin
B. phycocyanin
C. phycoerythrin
D. bilirubin

39. Which disease has been totally eradicated from the world because of effective vaccination?

A. Measles
B. Polio
C. Small pox
D. Hepatitis

40. Nutrition in fungi is___________?

A. Photosynthetic
B. Chemosynthetic
C. Completely parasitic
D. Absorptive heterotroph

41. Which of the following statement is incorrect about antibiotics?

A. They are used against microorganisms
B. They are always effective against bacteria
C. They are used in diseases like tuberculosis and pneumonia
D. They are derived from bacteria only

42. Fungi resemble plants because they lack___________?

A. Cell wall
B. Cytoplasm
C. Centriole
D. Nucleus

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43. Which treatment is instituted in a cancerous patient?

A. Antibiotic therapy
B. Radiotherapy
C. Gene therapy
D. None of these

44. Which is a parasitic plant?

A. cuscuta
B. rose
C. ferns
D. mosses

45. Which statement is incorrect for cloning?

A. The nucleus of a fertilized egg is replaced by the nucleus from the cell of a fully developed individual
B. Division of a single egg into one or more separate embryos.
C. The individual is the mirror image of the parent organism
D. It involves methods of sexual reproduction

46. True roots absent in_____________?

A. ferns
B. bryophytes
C. gymnosperms
D. angiosperms

47. Removal or degradation of environmental pollutants or toxic materials by living organisms is called__________?

A.  Integrated disease management
B. Hydroponic culture technique
C. Pasteurization
D. Bioremediation

48. The mechanism for ATP synthesis is_____________?

A. Chemosynthesis
B. Photosynthesis
C. Phosphorylation
D. Chemiosmosis

49. Which of the following is not a viral disease?

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A. Cowpox
B. Mumps
C. Tetanus
D. Small pox

50. Enzyme present in the saliva is_____________?

A. lipase
B. trypsin
C. ptyalin
D. invertase

 

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Biology MCQs

Biology Questions

In this article, we are going to give you the Biology Questions, These are the Biology Mcqs that are collected from various sources such as NTS Past papers, FPSC past papers, and entrance test of medical universities. These Biology Questions will help the students to get higher marks in biology the subject.

Biology MCQs

Biology Questions

1. Which of the following cytoskeletal fiber contain tubulin protein?

A. One which help in assembly of spindles during mitosis.
B. One involved in internal cell motion.
C. One involved in maintenance of cell shape.
D. Both b and c

2. Only myosine is present in_____________?

A. A band
B. 1 band
C. H zone
D. Sarcomere

3. Joints present in skull are example of_______________?

A. Fibrous joints
B. Cartilaginous joints
C. Synovial Joints
D. Slightly moveable joints

4. The human naked eye can differentiate between two points which are __________ apart?

A. 1.0 mm
B. 0.1 mm
C. 1.0 cm
D. 1.0 dm


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5. _____________ is a nervous disorder characterized by involuntary tremors, diminished motor power and rigidity?

A. Epilepsy
B. Meningitis
C. Alzheimer’s disease
D. Parkinson’s disease

6. Of the following which one is not the characteristic of mitochondria?

A. It contains F1 particles
B. It is involved in the synthesis of protein
C. It is a self-replicating organelle
D. Number of mitochondria is constant

7. In human female, fertilization commonly occurs at______________?

A. Proximal part of oviduct
B. Distal part of oviduct
C. Uterus
D. Cervix

8. The part of chloroplast where CO2 is fixed to manufacture sugar is__________?

A. Stroma
B. Grana
C. Thylakoid
D. Outer membrane

9. Highest form of learning is__________________?

A. Latent learning
B. Insight learning
C. Operant conditioning
D. Instinct

10. Which of the following hormone is polypeptide in nature____________?

A. Insulin
B. Thyroxine
C. ADH
D. Cortisone

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11. Reactions in which simple substances are combined to form complex substances are called_____________?

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A. Metabolic reactions
B. Catabolic reactions
C. Anabolic reactions
D. None of these

12. Which chemical component has the same % in bacterial as well as the mammalian cell_____________?

A. Water
B. Carbohydrate
C. Proteins
D. Lipids

13. The branch of biology which deals with the study of chemical compounds and the chemical processes in the fliving organisms is called_________________?

A. Chemistry
B. Biochemistry
C. Molecular biology
D. Both a and b

14. Which chemical component has the greatest contribution in the total mammalian cell weight__________?

A. Proteins
B. Carbohydrate
C. Lipids
D. Water

15. Which one is an organic compound_____________?

A. CO2
B. Water
C. Lipids
D. HCI

16. Carbon atom is_____________?

A. Monovalent
B. Divalent
C. Trivalent
D. Tetravalent

17. The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is_______________?

A. High specific heat of vaporization
B. High specific heat capacity
C. Its Dipole nature
D. Its liquid state

18. The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called___________?

A. Specific Heat of Vaporization
B. Specific Heat capacity
C. Caloric Heat
D. Both A and C

19. The one which is present in all living things is ___________?

A. Cell nucleus
B. DNA or RNA
C. Cell membrane
D. Vacuole

20. The mechanism of stomatal movement is related to the branch of Biology called__________?

A. Taxonomy
B. Physiology
C. Morphology
D. Anatomy

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21. Which of the following substance is most favorable to form structural component of biological membranes___________?

A. Hydrophilic Carbohydrates
B. Hydrophobic fats.
C. Both a and b
D. None of these

22. Maximum number of species of living things on earth are___________?

A. Algae
B. Fungi
C. Insects
D. Protozoa

23. Which statement is true about an aqueous medium________________?

A. Ionic as well as non-ionic substance in aqueous media retains their identity
B. Enzymes cannot perform catalysis reaction in this medium
C. Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
D. It is less favorable media for chemical reactions

24. Which of the following carbohydrate is tasteless___________?

A. Monosaccharide
B. Oligosaccharide
C. Polysaccharide
D. None of these

25. Which of the statement is not true for compounds like glycoprotein and glycolipids____________?

A. They are conjugated molecules of carbohydrates
B. Both have role in the extra cellular matrix of animals and bacterial cell wall
C. They are components of biological membranes.
D. Both are produced and secreted by endoplasmic reticulum

26. A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called__________?

A. Lipid
B. Carbohydrate
C. Protein
D. Carotein

27. Specific heat of vaporization of water is_______________?

A. 574 Kcal/kg
B. 674 Kcal/kg
C. 774 Kcal/kg
D. 874 Kcal/kg

28. Cn(H2O)n. is a general formula of_____________?

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A. Monosaccharides
B. Oligosaccharides
C. Polysaccharides
D. Carbohydrates

29. Which one are most complex sugar_____________?

A. Monosaccharides
B. Oligosaccharides
C. Polysaccharides
D. None of these

30. Variety among amino acids is produced due to_____________?

A. NH2 group
B. COOH group
C. R group
D. All of these

31. Number of nuclear pores/nucleus in an RBC are_________?

A. 1?3
B. 3?4
C. 10000
D. 30000

32. Yellow cytoplasm in ascidian gives rise to______________?

A. Epidermis
B. Muscle cells
C. Gut
D. Notochord

33. Chlorophyll molecule contains __________ as central metal ion.

A. Fe2+
B. Mg2+
C. Zn2+
D. Cu2+

34. Okazaki fragments are connected together through action of_________________?

A. Primase
B. Polymerase
C. Helicase
D. Ligase

35. Which of the following combination is an example of self-replicating organelles?

A. Mitochondria Ribosomes
B. Mitochondria Nucleus
C. Mitochondria Chloroplast
D. Mitochondria Vacuole

36. Which of the following is an autosomal disorder______________?

A. Down’s syndrome
B. Klinifelter’s syndrome
C. Turner’s syndrome
D. Jacob’s syndrome

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37. The place of centromere where spindle fiber get attached is_________?

A. Kinetochore
B. Kinochore
C. Centromere region
D. all of these

38. Embryonic induction is caused by part developing from_____________?

A. Endoderm
B. Ectoderm
C. Mesoderm
D. Extraembryonic layers

39. Sickle cell anemia is an example of_________________?

A. Chromosomal aberration
B. Insertion of gene
C. Deletion of gene
D. Point mutation

40. The type of plastids which help in pollination is_________?

A. Chromoplasts
B. Leucoplasts
C. Chloroplasts
D. All of these

41. Ribosomes were discovered by_______?

A. Golgi
B. De Duve
C. Palade
D. R.Brown

42. Which character differentiates living things from non-living organisms___________?

A. They live in the same ecosystem.
B. They are acted upon by the same environment
C. They are highly organized and complex made of one or more cells and contain genetic material
D. Both a and b

43. The study of fossils is called__________?

A. Environmental Biology
B. Historical biology
C. Palaentology
D. Social biology

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44. A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called__________?

A. Substrate
B. Co-factor
C. Inhibitor
D. Promotor

45. The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by________?

A. Molecular biologists
B. Microbiologists
C. Freshwater biologists
D. Social biologist

46. Percentage of water in brain cells is_______?

A. 20%
B. 65%
C. 85%
D. 89%

47. The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________?

A. An organ
B. A molecule
C. Tissue
D. Both a and c

48. Different species of plants and animals living in the same habitat is called ___________?

A. Population
B. Community
C. Biome
D. Habitat

49. In animal coordination is achieved by means of_________?

A. Respiratory system
B. Nervous system
C. Endocrine system
D. Both b and c

50. ___________ is the potential source of chemical energy for cellular activities?

A. C-H bond
B. C-O bond
C. C-N bond
D. P-O-C bond

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Biology MCQs

Basic Biology MCQs

In this article, we are going to give you the Basic Biology MCQs, These are the Biology Mcqs that are collected from various sources such as NTS Past papers, FPSC past papers, and entrance test of medical universities. These Basic Biology MCQs will help the students to get higher marks in biology the subject.

Biology MCQs

Basic Biology MCQs

1. The covalent bond between two monosaccharide subunits is called________________?

A. Phosphodiester bond
B. Peptide bond
C. Glycosidic Bond
D. Ionic bond

2. The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called___________?

A. Diffusion
B. Osmosis
C. Phagocytosis
D. Plasmolysis

3. Which of the following polysaccharide is called animal starch_________________?

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A. Starch
B. Glycogen
C. Cellulose
D. None of these

4. Which one gives blue colour with iodine_______________?

A. Starch
B. Glycogen
C. Cellulose
D. Polysaccharide

5. Mycoplasmas have been included in bacteria because:

A. Do not have a cell wall
B. Are heterotrophic
C. Lack membrane bounded organelles
D. Reproduce by binary fission

6. Which one is abundant in animals___________?

A. Starch
B. Glycogen
C. Cellulose
D. None of these

7. The one which can tolerate highest external osmotic pressure is __________?

A. Algae
B. Amoeba
C. Fungi
D. Bacteria

8. The cell wall of oomycetes is chiefly composed of___________?

A. Chitin
B. Cellulose
C. Lignin
D. Proteins

9. __________ is example of pure form of cellulose?

A. Silk
B. Wool
C. Cotton
D. Paper

10. A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called________________?

A. Monosaccharide
B. Fatty acid
C. Neutral lipid
D. Nucleic acid

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11. Lipids are soluble in which of the following_______________?


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A. Water
B. Ether
C. All solvents
D. Not in any of the above

12. One celled green protist are included in___________?

A. Monera
B. Algae
C. Slime molds
D. Plants

13. Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of__________________?

A. C-C bonds
B. C-H bonds
C. C-N bonds
D. C-O bonds

14. Fatty acids containing 18 C atoms and a single double bond is____________?

A. Saturated Fatty acid
B. Unsaturated fatty acid
C. Oleic Acid
D. Plamitic acid

15. Pick the odd one out

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A. Psilophyton
B. Rhynia
C. Cooksonia
D. Psilotum

16. Which of the following statement is incorrect5 for fats containing unsaturated fatty acid_____________?

A. They contain double bond
B. They are usually solid at room temperature
C. They are lighter than water
D. Their specific gravity is less than 1

17. Which one the following fatty acid is more soluble in an organic solvent and has higher melting point____________?

A. Acetic acid
B. Butyric acid
C. Palmitic acid
D. All have same

18. Peptide bond is_____________?

A. C-N link
B. C- O link
C. N-H link
D. C-H link

19. Animals obtain carbohydrates mainly from___________?

A. Glucose
B. Starch
C. Sucrose
D. Glycogen

20. The one which is incorrect pair?

A. Sori – Indusium
B. Arthrophytes – Jointed
C. Dichotomous – Vernation
D. Lycopods – Ground pries

21. Double fertilization occurs in_________?

A. All plants
B. All seed plants
C. Gymnosperms
D. Angiosperms

22. Proteins comprise of ___________% of the total dry weight of a cell?

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A. 40%
B. 50%
C. 60%
D. 70%

23. Adult birds normally possess only one functional____________?

A. Ureter
B. Ovary
C. Lung
D. Testis

24. Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbohydrates (iii) proteins (iv) DNA_________________?

A. i & ii
B. iii & iv
C. i ii iii & iv
D. iv only

25. Following possess bilateral symmetry as larva and radial symmetry as adult:

A. Chordata
B. Hydra
C. Echinodermata
D. Hemichordata

26. Proteins are polymers of___________?

A. Fatty acids
B. Isoprenoid units
C. Amino acids
D. Nucleotides

27. Which of the following is the empirical formula of chlorophyll b?

A. C55H70O5N4Mg
B. C55H72O6N4Mg
C. C55H70O6N4Mg
D. C55H72O5N4Mg

28. In Glycin an amino acid R group is replaced by____________?

A. H
B. CH3
C. COOH
D. C = O

29. How many moles of carbon dioxide are produced by complete oxidation of one mole of puruvic acid?

A. 1
B. 2
C. 3
D. 6

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30. The element in basic structure of proteins which differentiate them from carbohydrates________?

A. C
B. S
C. H
D. N

31. Primary structure of proteins determines__________?

A. Number of polypeptide chains involved
B. Bending of polypeptide chains
C. Amino acid sequence
D. Coiling of polypeptide chains

32. Ribose is an example of___________?

A. Trioses
B. Tetroses
C. Pentose
D. Hexose

33. The one which is not a globular protein__________?

A. Anti Rh-antibody
B. Enzyme
C. Myosin
D. Haemoglobin

34. Starch cellulose and glycogen yield ___________ on complete hydrolysis?

A. Maltose
B. Sucrose
C. Fructose
D. Glucose

35. ____________% of Glucose normally present in our blood is?

A. 0.80%
B. 0.08%
C. 1.80%
D. 8%

36. Which of the following carbohydrate can not be hydrolysed__________________?

A. Monosaccharide
B. Oligosaccharide
C. Polysaccharide
D. None of these

37. An enzyme which converts a dipeptide into separate amino acids is an example of__________?

A. Decarboxylase
B. Hydrolase
C. Oxidoreductase
D. Transferase

38. Which one is soluble in hot water_____________?

A. Starch
B. Glycogen
C. Amylose
D. Amylopectin.

39. For the synthesis of 10g of glucose ______________ of energy is required?

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A. 717.6 Kcal
B. 727 Kcal
C. 737 Kcal
D. 747 Kcal

40. Cellular digestion is associated with which organelle__________?

Mitochondria
B. Golgi bodies
C. Plastids
D. Lysosomes

41. Ribosomes are assembled in__________?

A. Nucleolus
B. Nucleus
C. DNA
D. RNA

42. Far-red light promotes flowering in_______________?

A. Short day plant
B. Long day plant
C. Day neutral plant
D. None of these

43. Which of the following is not present in mitochondria?

A. Enzymes
B. Co-enzymes
C. Ribosomes
D. Thylakoids

44. Secretin inhibits production of__________________?

A. Gastric juice
B. Pancreatic juice
C. Bile
D. All of these

45. Yellowish glandular structure which produces progesterone is_____________?

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A. Graffian follicle
B. Ovary
C. Corpus luteum
D. Placenta

46. The stent energy in the form of ADP is regenerated by mitochondria into__________?

A. AMP
B. ADP
C. ATP
D. All of these

47. XO-XX pattern of sex determination is present in______________?

A. Grasshopper
B. Butterfly
C. Drosophila
D. Man

48. On which of the following component of chloroplast chlorophyll is arranged?

A. Cell membrane
B. Matrix
C. Thylakoids
D. Stroma

49. An example of codominance is______________?

A. A’ blood group
B. B’ blood group
C. O’ blood group
D. AB’ blood group

50. Test cross is used to find_____________?

A. Trait
B. Phenotype
C. Genotype
D. Ratios


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Biology MCQs

FPSC Biology MCQs

In this article, we are going to give you the FPSC Biology MCQs, These are the Biology Mcqs that are collected from various sources such as NTS Past papers, FPSC past papers, and entrance test of medical universities. These FPSC Biology MCQs will help the students to get higher marks in biology the subject.

Biology MCQs

FPSC Biology MCQs

1. Purines and pyrimidines are in equal ration in DNA. It was indicated by_______________?

A. F.Miescher
B. Chargaff
C. Watson & Crick
D. Harshay & Chase

2. Chlorophyll is a/an _____ molecule?

A. Inorganic
B. Cationic
C. Anionic
D. Organic

3. Ribonucleo-protein particles are the name of__________?

A. DNA
B. Nucleus
C. Eukaryotic ribosomes
D. RNA

4. Lock and Key model was proposed by______________?

A. Emil Fischer
B. Koshland
C. Robin Williams
D. Rudolph Virchow

5. Which step causes activation of catalytic site of an enzyme__________________?

A. Change in pH of the surroundings.
B. Formation of Enzyme Sustrate complex.
C. Change in the charge of the active site.
D. Change in temperature

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6. Amoeboid movements and movement of cyclosis is due to_________?

A. Microfilaments
B. Microtubules
C. Intermediate filaments
D. Cytoskeleton

7. Enzymes __________________ the activation energy of a chemical reaction?

A. Increases
B. Decreases
C. Does not-effect
D. Increases or decreases depending upon individual enzyme

8. Which one forms the raw material for coenzymes_______________________?

A. Vitamins
B. Carbohydrates
C. Proteins
D. Metals

9. Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by___________?

A. Ribosomes
B. Cytoplasm
C. Golgi apparatus
D. Endoplasmic reticulum

10. Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called_____________________?

A. Cofactor
B. Coenzymes
C. Activator
D. Enzymes

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11. In which of the following location enzymes controlling cellular respiration are present____________?

A. Nucleus
B. Chlorophast
C. Milochondria
D. Ribosome

12. In golgi apparatus the maturing face is____________?

A. Biconcave
B. Convex
C. Spherical
D. Concave

13. A cofactor made of inorganic ion which is detachable is called__________________?

A. Prosthetic group
B. Coenzyme
C. Activator
D. Cofactor

14. An activated enzyme consisting of polypeptide chain and a cofactor is called_______________?

A. Apoenzyme
B. Holoenzyme
C. Activated enzyme
D. Both b and c

15. Centrioles are composed of ________ triplets of microtubules.

A. 3
B. 9
C. 10
D. 15

16. Which statement about enzyme is incorrect_________________?

A. Some of them consist solely of protein with no non protein part.
B. They catalyze a chemical reaction without being utilized.
C. All enzymes are fibrous Proteins.
D. They without their cofactor are called apoenzyme.


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17. A three dimensional activity bearing a specific charge by which the enzyme reacts with its substrate is called_________________?

A. Active site
B. Binding site
C. Catalytic site
D. Allosteric site

18. Cellular organelles related with H2O2 are___________?

A. Glyoxisomes
B. Lysosomes
C. Peroxisomes
D. Ribosomes

19. If more substrate to already occurring enzymatic reaction is added more enzyme activity is seen because_____________?

A. There is probably more substrate present than there is enzyme.
B. There is probably more enzayme available than there is substrate.
C. There is probably more product present than there is either substrate or enzyme.
D. The enzyme substrate complex is probably failing to form during the reaction

20. A group of ribosomes attached to mRNA is known as___________?

A. Polymer
B. Polypeptide
C. Polysomes
D. Monomer

21. The rate of reaction is directly proportional to the concentration of an enzyme which statement is incorrect in this respect_________________?

A. Increase in enzyme molecule increases the available active sites.
B. This relation is for unlimited time period with unlimited enzyme concentration
C. If the concentration is doubled the rate will become two fold.
D. None of these.

22. Which statement is incorrect about Lock and Key Model________________?

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A. Specific enzyme can transform only a specific substrate
B. Active site of an enzyme is a non-flexible structure
C. Active site does not change before during or even after the reaction
D. It explains the mechanism of every chemical reaction

23. If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________?

A. Enzymes get denatured at higher substrate conc
B. Rate of reaction is indirectly proportional to substrate concentration at this point
C. All the active sites on enzyme molecule are occupied
D. None of these

24. The active site of an enzyme______________?

A. Never changes
B. Forms no chemical bond with substrate
C. Determined by structure and the specificity of the enzyme
D. They are non-specific in their action

25. Factory of Ribosomal synthesis is__________?

A. Cytoplasm
B. Nucleus
C. Nucleolus
D. Endoplasmic reticulum

26. If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction what is the form given to this situation___________?

A. Saturation
B. Denaturation
C. Composition
D. Inhibition

27. Who opposed the idea the cell is an empty space bounded by thick wall?

A. Lorenz Oken
B. Schwann
C. Robert Brown
D. Rudolph Virchow

28. Extreme change in pH results in______________?

A. Change in ionization of amino acids at the active site of the enzyme
B. Change in the ionization of the substrate
C. Denaturation of the enzyme
D. Increase in the reaction rate

29. Resolution power of a compound microscope is___________?

A. 2.0 m
B. 2-4 A
C. 24 m
D. 24 A

29. Excessive increase in temperature of medium causes the enzyme molecule to____________?

A. Activate
B. Unaffected
C. Denatured
D. None of these

30. If enzyme concentration is low than substrate pH and temperature values are equal to requirement then which of the following will increase rate of reaction____________________?

A. increase in concentration of enzyme
B. increase in concentration of substrate
C. increase in pH
D. increase in temperature

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31. In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon____________?

A. Their physical properties like size & weight.
B. Physical properties of the medium like its density.
C. Their electrical properties like their charges
D. Both a and b

32. The structure of an enzyme is altered by____________?

A. Irreversible inhibitor
B. Reversible inhibitor
C. Competitive inhibitor
D. Non-competitive inhibitor

33. Malonic acid is an example of____________?

A. Irreversible inhibitor
B. Reversible inhibitor
C. Competitive inhibitor
D. Non-competitive inhibitor

34. Magnifying power of electron microscope as compared to eye is____________?

A. 500 X
B. 250000X
C. 500000X
D. 250X

35. Inhibitors which block the enzyme by forming weak bond are called___________?

A. Competitive inhibitors.
B. Non-competitive inhibitors
C. Irreversible inhibitors.
D. Both a and b

36. Which of the statement about cell membrane is not true?

A. It contains protein molecules embedded in lipid bilayer
B. It is a differentially permeable membrane.
C. It contains charged pores thus ions being charged particles cross cell membrane much easier than neutral particles.
D. It may get in folded to engulf solid or liquid material.

37. A substance which binds at the active site of the enzyme but does not result in the formation of the products is called________________?

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A. Irreversible inhibitor
B. Reversible inhibitor
C. Competitive inhibitor
D. Non-competitive inhibitor

38. A chemical substance which can react (in place of substrate) with the enzyme but is not transformed into product/s and thus blocks the active site temporarily or permanently is called_______________?

A. Co-enzyme
B. Blocker
C. Inhibitor
D. Cofactor

39. Optimal temperature of enzymes present in human body is_____________?

A. 27C
B. 37C
C. 47C
D. 30C

40. Strengthening material of prokaryotic cell wall is__________?

A. Cellulose
B. Chitin
C. Inorganic salts silica waxes and ligin
D. Peptidoglycan or Murein.

41. Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called__________?

A. Cytosol
B. Cisternae
C. Polysomes
D. Cristae

42. What is not the function of endoplasmic reticulum?

A. Nerve impulse conduction
B. Transport of material
C. Mechanical support
D. Synthesis of conjugated molecules

43. 60S and 40S subunit combine to form ________ particle.

A. 100 S
B. 90 S
C. 80 S
D. 70 S

44. Pancreas produces secretory granules that help in digestion. These granules after passing through endoplasmic reticulum are pinched off from ________ surface of Golgi apparatus:


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A. Forming face
B. Maturating face
C. Any of them
D. None of these

45. Which of the following statement is incorrect about Glyoxisomes?

A. They contain enzymes which help in conversion of fatty acids into carbohydrate
B. They are abundant in soya beans but absent in pea.
C. They are present throughout life of a plant and provide them whth energy through Glyoxylate cycle.
D. They are single membranous organelles

46. Ribosomes + m-RNA?

A. Polysome
B. Phlosome
C. Polosome
D. None of these

47. Which of the following impart a red colour to Rose petals?

A. Chloroplast
B. Chlorophyll
C. Chromoplast
D. Leucoplast

48. During digesting the phagocytosed food particles vesicles formed from fusion of phagocytic vacuole with the enzymes secreted by Golgi apparantus are called_______?

A. Lysosomes
B. Primary lysosomes
C. Secondary lysosomes
D. Food vacuole

49. The bond formed when two or more atoms complete their electron shells by sharing electrons is called_____________?

A. Ionic bond
B. Hydrogen bond
C. Covalent bond
D. Electrovalent bond

50. Which one is the basic element of organic compounds _________________?

A. Oxygen
B. Hydrogen
C. Sulphur
D. Carbon


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Biology MCQs

NTS Biology MCQs

In this article, we are going to give you the NTS Biology MCQs, These are the Biology Mcqs that are collected from various sources such as NTS Past papers, FPSC past papers, and entrance test of medical universities. These NTS Biology MCQs will help the students to get higher marks in biology the subject.

Biology MCQs

NTS Biology MCQs

1. It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect

A. Older sediment layers have equal amount of these radioactive isotopes as that of the young ones
B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.
D. Older sediment layers did not have these radioactive isotopes

2. Reverse transcriptase is present in____________?

A. All RNA viruses
B. All DNA viruses
C. All retroviruses
D. All viruses

3. Destruction of all life forms is called___________?

A. Sterilization
B. Disinfection
C. Antisepsis
D. Preservation


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4.  Pox viruses are_________?

A. RNA non-enveloped
B. RNA enveloped
C. DNA non-enveloped
D. DNA enveloped

5. Pollen grains in pinus have __________ for dispersal through wind?

A. Flagella
B. Cilia
C. Wings
D. Feathers

6. The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called______________?

A. Ovule
B. Seed
C. Fruit
D. Embryo sac

7. Alternation of generations is absent in___________?

A. Hydration
B. Obelia
C. Jelly fish
D. Physalia

8. Double fertilization is feature of____________?

A. Ferns
B. Whisk ferns
C. Gymnosperms
D. Angiosperms

9. If bile pigments are prevented from leaving digestive tract, then they cause_____________?

A. Hepatitis
B. Jaundice
C. Gall stones
D. Blockage

10. Initial pH of food vacuole during digestion in amoeba is____________?

A. 5.3
B. 5.6
C. 7.3
D. 7.6

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11. The arrangement of _________ speaks of the division of labour within cell?

A. Molecule
B. Subatomic particles
C. Atoms
D. Organelles

12. NADH is oxidized by___________?

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A. Coenzyme
B. Cytochrome b
C. Oxygen
D. Glycolysis

13. Salivary glands present in front of ear are___________?

A. Sublingual
B. Submaxillary
C. Submandibular
D. Parotid

14. How many spiracles are present in cockroach_____________?

A. 5
B. 10
C. 20
D. 40

15. Which of the following is the correct sequence in the biological method?

A. Observation-hypothesis-law-theory
B. Observation-hypothesis-deduction-testing of deduction
C. Hypothesis-observation-deduction-testing of deduction
D. law-theory-deduction-observation

16. Amphibians are considered to be evolved from___________?

A. Newts
B. Varanope
C. Dipnoi
D. Hagfishes

17. Enterobius vermicularis is commonly known as____________?

A. Flatworm
B. Pinworm
C. Hook worm
D. Tapeworm

18. Red to orange pigments are_____________?

A. Carotenes
B. Carotenoids
C. Xanthophylls
D. Chlorophyll

19. Animals of which class of arthropoda are present everywhere_____________?

A. Crustacean
B. Insecta
C. Arachnida
D. Myriapoda

20. Gaseous exchange in birds occurs at level of_______________?


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A. Alveoli
B. Air sacs
C. Bronchi
D. Parabronchi

21. ______________ of earth surface is covered with water?

A. 10%
B. 30%
C. 75%
D. 90%

22. An antibody is made of _________ polypeptide chains?

A. 1
B. 2
C. 3
D. 4

23. Production of genetically identical copies of organisms/cells by asexual reproduction is called__________?

A. Mitosis
B. Replication
C. Cloning
D. Biological control

24. 95% of the cytoplasm of RBCs is____________?

A. Hemoglobin
B. Enzymes
C. Salts
D. Other proteins

25. _________________ cells of phloem are directly involved in transport of organic solutes?

A. Parenchyma
B. Companion cell
C. Tracheid
D. Sieve element

26. An infectious disorder of respiratory system is_________________?

A. Cancer
B. Asthma
C. Tuberculosis
D. Emphysema

27. Cuticular transpiration is _____________ of total transpiration?

A. 1-2%
B. 3-4%
C. 5-7%
D. 90%

28. According to cohesion-tension theory, tension is created by__________________?

A. Hydrogen bonding
B. Transpiration
C. Adhesion
D. Root pressure

29. Deoxygenated blood first enters in _________ part in fishes?

A. Sinus venosus
B. Right atrium
C. Left atrium
D. Conus arteriosus

30. Ozone depletion occurs commonly due to_______________?

A. Carbon dioxide
B. Chlorofluorocarbons
C. UV rays
D. Deforestation

31. Who coined the term CELL?

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A. Schwann
B. Schleiden
C. Robert Hook
D. Both a and b

32. “lubb” sound is produced due to___________________?

A. Opening of inlet valve
B. Closure of inlet valve
C. Opening of outlet valve
D. Closure of outlet valve

33. In condition of high temperature, following does not occur or occurs at low level__________?

A. Vasodilation
B. Activation of sweat glands
C. Thermogenesis
D. Evaporative cooling

34. Who first observed and thus hypothesized that new cells are formed from previously existing living cell?

A. Theodor Schwann and Schleiden
B. Rudolph Virchows
C. Louis Pasteur
D. Both b and c

35. In Hardy-Weinberg formula P2 represents frequency of_____________?

A. Recessive allele
B. Dominant allele
C. Homozygous dominant individual
D. Homozygous recessive individual

36. _____________ supported theory of special creation?

A. Linnaeus
B. Aristotle
C. Mendel
D. Lamarck

37. Percentage of proteins in cell membrane is____________?

A. 20-40%
B. 40-50%
C. 60-80%
D. 80-100%

38. Which of the following is most constant abiotic component of ecosystem___________?

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A. Air
B. Water
C. Land
D. Gravity

40. Ecosystem not found in Pakistan is_____________?

A. Tropical rain forest
B. Temperate deciduous forest
C. Grassland
D. Tundra

41. Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________?

A. Active transport
B. Passive transport
C. Co-transport
D. Counter transport

42. The productivity of aquatic ecosystem is basically determined by light and____________?

A. CO2
B. O2
C. Water
D. Nutrients

43. The first layer of cell wall which is formed is___________?

A. Primary wall
B. Secondary wall
C. Middle lamella
D. All of these

44. Annual rainfall in grassland is about_____________?

A. More than 2500 mm
B. 750-1500 mm
C. 250-750 mm
D. Less than 250 mm

45. Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________?

A. Rhizobium
B. Nitrosomonas
C. Nitrobacter
D. Pseudomonas

46. Cellulose is the major component of__________?

A. Primary wall
B. Secondary wall
C. Middle lamella
D. all of the above

47. Humming bird is an example of________________?

A.  Cold blooded animal
B. Ectotherm
C. Endotherm
D. Heterotherm

48. Number of cervical vertebrae is_____________?

A. 5
B. 7
C. 9
D. 12

49. Autophagosomes are____________?

A. Those lysosomes which eat parts of their own cells to generate energy.
B. Those lysosomes which eat old and worn out cellular organelles.
C. Lysosomes which help in extracellular digestion
D. Both a and b

50. Sapwood is formed from_____________?

A. Primary xylem
B. Secondary xylem
C. Primary phloem
D. Secondary phloem


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This is all about NTS Biology MCQs, If you like this post, then share this post with your friends and family so they could also get the maximum benefit from this information, and if you have any information regarding various tests and getting Jobs in Pakistan then please comment down below your experience so that, our viewers can get benefit from your knowledge.

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