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Biomolecules (Biology) · Question 31

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

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

Answer

(4) Statement I is correct but Statement II is incorrect

Solution

Statement I: Correct – as per NCERT, a particular property of amino acids is the ionizable nature of -NH2 and -COOH groups; hence in solutions of different pH the structure of amino acids changes.

Statement II: Incorrect – the zwitterionic form exists at the isoelectric pH (near neutral). In acidic pH the amino acid exists as a cation and in basic pH as an anion.

Answer: (4)

NEET (UG) 2022 (Phase 2)

Keep practising — Biomolecules (Biology)

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
NEET (UG) 2022 (Phase 2)
3

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
4

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)
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5

Identify the incorrect pair

  1. Drugs - Ricin
  2. Alkaloids - Codeine
  3. Toxin - Abrin
  4. Lectins - Concanavalin A
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6

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
7

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
8

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

  1. Collagen
  2. Lectin
  3. Insulin
  4. Haemoglobin
NEET (UG) 2020
9

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
10

Identify the basic amino acid from the following

  1. Valine
  2. Lysine
  3. Tyrosine
  4. Glutamic Acid
NEET (UG) 2020
11

Concanavalin A is:

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

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