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_________________?

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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
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

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40. Cellular digestion is associated with which organelle__________?

B. Golgi bodies
C. Plastids
D. Lysosomes

41. Ribosomes are assembled in__________?

A. Nucleolus
B. Nucleus

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__________?

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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