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Biomolecules (Biology) · Question 4

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1

Arrange the following elements in descending order of their contribution to percentage weight of the human body.

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

Answer

(2) A, B, C, D

Solution

Percentage weight of elements in the human body:

Oxygen (A) ≈ 65%

Carbon (B) ≈ 18.5%

Hydrogen (C) ≈ 9.5%

Nitrogen (D) ≈ 3.3%

∴ Descending order: Oxygen > Carbon > Hydrogen > Nitrogen, i.e., A, B, C, D.

(NCERT Table 9.1 prints 0.5% for hydrogen in the human body, a misprint for 9.5%.)

Answer: (2)

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Keep practising — Biomolecules (Biology)

2

The protein portion of an enzyme is called:

  1. Apoenzyme
  2. Prosthetic group
  3. Cofactor
  4. Coenzyme
NEET (UG) 2025
3

Match List-I with List-II Choose the option with all correct matches.

  1. A-III, B-II, C-I, D-IV
  2. A-II, B-III, C-I, D-IV
  3. A-III, B-IV, C-II, D-I
  4. A-III, B-II, C-IV, D-I
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4

Which one of the following statements refers to Reductionist Biology?

  1. Chemical approach to study and understand living organisms
  2. Behavioural approach to study and understand living organisms
  3. Physico-chemical approach to study and understand living organisms
  4. Physiological approach to study and understand living organisms
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5

Which one of the following enzymes contains 'Haem' as the prosthetic group?

  1. Succinate dehydrogenase
  2. Catalase
  3. RuBisCO
  4. Carbonic anhydrase
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6

Name the class of enzyme that usually catalyses the following reaction : S - G + S' S + S' - G Where, G a group other than hydrogen S a substrate S' another substrate

  1. Transferase
  2. Ligase
  3. Hydrolase
  4. Lyase
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7

Lecithin, a small molecular weight organic compound found in living tissues, is an example of:

  1. Amino acids
  2. Phospholipids
  3. Glycerides
  4. Carbohydrates
NEET (UG) 2024
8

The cofactor of the enzyme carboxypeptidase is:

  1. Zinc
  2. Niacin
  3. Flavin
  4. Haem
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9

Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of:

  1. Cofactor inhibition
  2. Feedback inhibition
  3. Competitive inhibition
  4. Enzyme activation
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10

Match List I with List II Choose the correct answer from the options given below.

  1. A-IV, B-I, C-II, D-III
  2. A-I, B-II, C-III, D-IV
  3. A-II, B-III, C-IV, D-I
  4. A-III, B-IV, C-I, D-II
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11

Match List I with List II: Choose the correct answer from the options given below :

  1. A-IV, B-II, C-III, D-I
  2. A-III, B-II, C-I, D-IV
  3. A-II, B-IV, C-I, D-III
  4. A-IV, B-I, C-III, D-II
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