NCERT CLASS 11 | TOPIC : BIOMOLECULES | PYQB (OLD) | NEET BIOLOGY ONLINE TEST ~ Kalvisolai Online Test

NCERT CLASS 11 | TOPIC : BIOMOLECULES | PYQB (OLD) | NEET BIOLOGY ONLINE TEST

It contains 24 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

1 ➤

(a) A: Potential energy, B: Transition state, C: Activation energy with enzyme, D: Activation energy without enzyme (b) A: Transition state, B: Potential energy, C: Activation energy without enzyme, D: Activation energy with enzyme (c) A: Potential energy, B: Transition state, C: Activation energy with enzyme, D: Activation energy without enzyme (d) A: Activation energy with enzyme, B: Transition state, C: Activation energy without enzyme, D: Potential energy

2 ➤ 2. Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? [AIPMT MAINS 2010]

(a) Enzymes require optimum pH for maximal activity. (b) Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures from 80°–90°C. (c) Enzymes are highly specific. (d) Most of the enzymes are proteins but some are lipids.

3 ➤

A) B) C) D)

4 ➤ 4. Select the correct option with respect to mitosis. [AIPMT PRE 2011]

(a) Chromatids start moving towards opposite poles in telophase. (b) Golgi complex and endoplasmic reticulum are still visible at the end of prophase. (c) Chromosomes move to the spindle equator and get aligned along the equatorial plate in metaphase. (d) Chromatids separate but remains at the centre of the cell in anaphase.

5 ➤ 5. The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration)

A) B) C) D)

6 ➤ 6. Which one of the following biomolecules is correctly characterized? [AIPMT MAINS 2012]

(a) Palmitic acid - An unsaturated fatty acid with 18 carbon atoms. (b) Adenylic acid - Adenosine with a glucose phosphate molecule. (c) Alanine amino acid - Contains an amino group and an acidic group anywhere in the molecule. (d) Lecithin - A phosphorylated glyceride found in cell membrane.

7 ➤

A) B) C) D)

8 ➤ 8. Which one is the most abundant protein in the animal world? [AIPMT PRE 2012]

(a) Trypsin (b) Haemoglobin (c) Collagen (d) Insulin

9 ➤

A) B) C) D)

10 ➤ 10. The transition state structure of the substrate formed during an enzymatic reaction is [AIPMT AIPMT 2013]

(a) Transient but stable (b) Permanent but unstable (c) Transient and unstable (d) Permanent and stable

11 ➤ 11. A phosphoglyceride is always made up of [AIPMT AIPMT 2013]

(a) Only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. (b) Only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. (c) A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. (d) A saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule.

12 ➤ 12. Macromolecule chitin is [AIPMT 2013]

(a) Nitrogen containing polysaccharide (b) Phosphorus containing polysaccharide (c) Sulphur containing polysaccharide (d) Simple polysaccharide

13 ➤ 13. The essential chemical components of many coenzymes are [AIPMT 2013]

(a) Proteins (b) Nucleic acids (c) Carbohydrates (d) Vitamins

14 ➤ 14. Select the option which is not correct with respect to enzyme action [AIPMT 2014]

(a) Substrate binds with enzyme at its active site (b) Addition of lot of succinate does not reverse the inhibition of Succinic dehydrogenase by malonate (c) A non – competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate (d) Malonate is a competitive inhibitor of Succinic dehydrogenase

15 ➤ 15. Which one of the following is non reducing carbohydrate? [AIPMT 2014]

(a) Maltose (b) Sucrose (c) Lactose (d) Ribulose 5 – phosphate

16 ➤ 16. Which one of the following statement is incorrect? [AIPMT 2015]

(a) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme inhibitor complex (b) In competitive inhibition, the inhibitor molecule is not chemically change by the enzyme (c) The competitive inhibitor does not affect the rate of breakdown of the enzyme subtract complex (d) The present of the competitive inhibitor decreases the Km of the enzyme for the substrate.

17 ➤ 17. The chitinous exoskeleton of arthropods is formed by the polymerization of: [RE-AIPMT 2015]

(a) D – glucosamine (b) N – acetyl glucosamine (c) Lipoglycans (d) Keratin sulphate and chondroitin sulphate

18 ➤ 18. Which of the following biomolecules does have a phosphodiester bond? [RE-AIPMT 2015]

(a) Monosaccharides in a polysaccharide (b) Amino acids in a polypeptide (c) Nucleis acids in a nucleotide (d) Fatty acids in a diglycerides

19 ➤ 19. One of the major components of cell wall of most fungi is: [NEET - I, 2016]

(a) Chitin (b) Peptidoglacan (c) Cellulose (d) Hemicellulose

20 ➤ 20. Which one of the following statements is wrong? [NEET - I, 2016]

(a) Sucrose is a disaccharide (b) Cellulose is a polysaccharide (c) Uracil is a pyrimidine (d) Glycine is a sulphur containing amino acid

21 ➤ 21. A typical molecule is made up of: [NEET - I, 2016]

(a) Three glycerol molecules and one fatty acid molecule (b) One glycerol and three fatty acid molecules (c) One glycerol and one fatty acid molecule (d) Three glycerol and three fatty acid molecules

22 ➤ 22. A non-proteinaceous enzyme is [NEET - II, 2016]

(a) Ribozyme (b) Ligase (c) Deoxyribonuclease (d) Lysozyme

23 ➤ 23. Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins? [NEET - II, 2016]

(a) Electrostatic interaction (b) Hydrophobic interaction (c) Ester bonds (d) Hydrogen bonds

24 ➤

A) B) C) D)

Your Score is

25 ➤ Question

A) B) C) D)

26 ➤ Question

A) B) C) D)

27 ➤ Question

A) B) C) D)

28 ➤ Question

A) B) C) D)

29 ➤ Question

A) B) C) D)

30 ➤ Question

A) B) C) D)

31 ➤ Question

A) B) C) D)

32 ➤ Question

A) B) C) D)

33 ➤ Question

A) B) C) D)

34 ➤ Question

A) B) C) D)

35 ➤ Question

A) B) C) D)

36 ➤ Question

A) B) C) D)

37 ➤ Question

A) B) C) D)

38 ➤ Question

A) B) C) D)

39 ➤ Question

A) B) C) D)

40 ➤ Question

A) B) C) D)

41 ➤ Question

A) B) C) D)

42 ➤ Question

A) B) C) D)

43 ➤ Question

A) B) C) D)

44 ➤ Question

A) B) C) D)

45 ➤ Question

A) B) C) D)

46 ➤ Question

A) B) C) D)

47 ➤ Question

A) B) C) D)

48 ➤ Question

A) B) C) D)

49 ➤ Question

A) B) C) D)

50 ➤ Question

A) B) C) D)

51 ➤ Question

A) B) C) D)

52 ➤ Question

A) B) C) D)

53 ➤ Question

A) B) C) D)

54 ➤ Question

A) B) C) D)

55 ➤ Question

A) B) C) D)

56 ➤ Question

A) B) C) D)

57 ➤ Question

A) B) C) D)

58 ➤ Question

A) B) C) D)

59 ➤ Question

A) B) C) D)

60 ➤ Question

A) B) C) D)

61 ➤ Question

A) B) C) D)

62 ➤ Question

A) B) C) D)

63 ➤ Question

A) B) C) D)

64 ➤ Question

A) B) C) D)

65 ➤ Question

A) B) C) D)

66 ➤ Question

A) B) C) D)

67 ➤ Question

A) B) C) D)

68 ➤ Question

A) B) C) D)

69 ➤ Question

A) B) C) D)

70 ➤ Question

A) B) C) D)

71 ➤ Question

A) B) C) D)

72 ➤ Question

A) B) C) D)

73 ➤ Question

A) B) C) D)

74 ➤ Question

A) B) C) D)

75 ➤ Question

A) B) C) D)

76 ➤ Question

A) B) C) D)

77 ➤ Question

A) B) C) D)

78 ➤ Question

A) B) C) D)

79 ➤ Question

A) B) C) D)

80 ➤ Question

A) B) C) D)

81 ➤ Question

A) B) C) D)

82 ➤ Question

A) B) C) D)

83 ➤ Question

A) B) C) D)

84 ➤ Question

A) B) C) D)

85 ➤ Question

A) B) C) D)

86 ➤ Question

A) B) C) D)

87 ➤ Question

A) B) C) D)

88 ➤ Question

A) B) C) D)

89 ➤ Question

A) B) C) D)

90 ➤ Question

A) B) C) D)

91 ➤ Question

A) B) C) D)

92 ➤ Question

A) B) C) D)

93 ➤ Question

A) B) C) D)

94 ➤ Question

A) B) C) D)

95 ➤ Question

A) B) C) D)

96 ➤ Question

A) B) C) D)

97 ➤ Question

A) B) C) D)

98 ➤ Question

A) B) C) D)

99 ➤ Question

A) B) C) D)

100 ➤

A) B) C) D)

Your Score is