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Biomolecules (Biology) · Question 32

NEET (UG) 2022 (Phase 2)MCQEasy📈 Topic in 62% papers+4−1
1

In the enzyme which catalyses the breakdown of: 2H2O2 2H2O + O2 the prosthetic group is :

  1. Niacin
  2. Nicotinamide adenine dinucleotide
  3. Haem
  4. Zinc

Answer

(3) Haem

Solution

The enzyme that catalyses the breakdown of hydrogen peroxide into water and oxygen is catalase (a peroxidase).

As per NCERT, prosthetic groups are organic compounds tightly bound to the apoenzyme; e.g., in peroxidase and catalase, which catalyse the breakdown of hydrogen peroxide to water and oxygen, haem is the prosthetic group and it is a part of the active site of the enzyme.

⇒ NAD (containing niacin) is a co-enzyme and zinc is a metal-ion cofactor (of carboxypeptidase).

∴ The prosthetic group is haem.

Answer: (3)

NEET (UG) 2022 (Phase 2)

Keep practising — Biomolecules (Biology)

2

Which of the following are not secondary metabolites in plants?

  1. Rubber, gums
  2. Morphine, codeine
  3. Amino acids, glucose
  4. Vinblastin, curcumin
NEET (UG) 2021
3

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

  1. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
  2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  3. (a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
  4. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
NEET (UG) 2021
4

Identify the incorrect pair

  1. Drugs - Ricin
  2. Alkaloids - Codeine
  3. Toxin - Abrin
  4. Lectins - Concanavalin A
NEET (UG) 2021
5

Following are the statements with reference to 'lipids'. Choose the correct answer from the options given below.

  1. B and E only
  2. A and B only
  3. C and D only
  4. B and C only
NEET (UG) 2021
6

Identify the substances having glycosidic bond and peptide bond, respectively in their structure

  1. Glycerol, trypsin
  2. Cellulose, lecithin
  3. Inulin, insulin
  4. Chitin, cholesterol
NEET (UG) 2020
7

Which one of the following is the most abundant protein in the animals?

  1. Collagen
  2. Lectin
  3. Insulin
  4. Haemoglobin
NEET (UG) 2020
8

Match the following Choose the correct option from the following

  1. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
  2. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
  3. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
NEET (UG) 2020
9

Identify the basic amino acid from the following

  1. Valine
  2. Lysine
  3. Tyrosine
  4. Glutamic Acid
NEET (UG) 2020
10

Concanavalin A is:

  1. a lectin
  2. a pigment
  3. an alkaloid
  4. an essential oil
NEET (UG) 2019
11

Consider the following statements: Select the correct option

  1. Both A and B are false
  2. A is false but B is true
  3. Both A and B are true
  4. A is true but B is false
NEET (UG) 2019

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