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Biomolecules (Biology)

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

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)

Keep practising — Biomolecules (Biology)

Ques. 2NEET (UG) 2021

Which of the following are not secondary metabolites in plants?

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

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)
Ques. 4NEET (UG) 2021

Identify the incorrect pair

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

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
Ques. 6NEET (UG) 2020

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
Ques. 7NEET (UG) 2020

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

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

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)
Ques. 9NEET (UG) 2020

Identify the basic amino acid from the following

  1. Valine
  2. Lysine
  3. Tyrosine
  4. Glutamic Acid
Ques. 10NEET (UG) 2019

Concanavalin A is:

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

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

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