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Biomolecules (Biology) · Question 30

NEET (UG) 2022 (Phase 2)MCQEasy📈 Topic in 88% papers+4−1
1

Primary proteins are also called as polypeptides because :

  1. They can assume many conformations
  2. They are linear chains
  3. They are polymers of peptide monomers
  4. Successive amino acids are joined by peptide bonds

Answer

(4) Successive amino acids are joined by peptide bonds

Solution

As per NCERT, proteins are polypeptides; they are linear chains of amino acids linked by peptide bonds.

A peptide bond is formed when the carboxyl (-COOH) group of one amino acid reacts with the amino (-NH2) group of the next amino acid with the elimination of a water molecule.

∵ Successive amino acids are joined by peptide bonds, a protein is called a polypeptide.

Answer: (4)

NEET (UG) 2022 (Phase 2)

Keep practising — Biomolecules (Biology)

2

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

  1. Statement I is incorrect but Statement II is correct
  2. Both Statement I and Statement II are correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect
NEET (UG) 2022 (Phase 2)
3

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
NEET (UG) 2022 (Phase 2)
4

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
5

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
6

Identify the incorrect pair

  1. Drugs - Ricin
  2. Alkaloids - Codeine
  3. Toxin - Abrin
  4. Lectins - Concanavalin A
NEET (UG) 2021
7

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
8

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
9

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

  1. Collagen
  2. Lectin
  3. Insulin
  4. Haemoglobin
NEET (UG) 2020
10

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
11

Identify the basic amino acid from the following

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

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