PYQSide ExamsMy practice

Biomolecules (Biology) · Question 25

NEET (UG) 2023MCQEasy📈 Topic in 38% papers+4−1
1

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

  1. Both Statement I and Statement II are false.
  2. Statement I is true but Statement II is false.
  3. Statement I is false but Statement II is true.
  4. Both Statement I and Statement II are true.

Answer

(4) Both Statement I and Statement II are true.

Solution

Statement I is true: low temperature preserves the enzyme in a temporarily inactive state, whereas high temperature destroys enzymatic activity because proteins are denatured by heat.

Statement II is true: an inhibitor that closely resembles the substrate in molecular structure and inhibits the enzyme is a competitive inhibitor (e.g. malonate for succinic dehydrogenase).

Answer: (4)

NEET (UG) 2023

Keep practising — Biomolecules (Biology)

2

Read the following statements on lipids and find out correct set of statements : Choose the correct answer from the options given below:

  1. A, B and C only
  2. A, D and E only
  3. C, D and E only
  4. A, B and D only
NEET (UG) 2022
3

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is C6H12O6 then what is the formula for maltose?

  1. C12H20O10
  2. C12H24O12
  3. C12H22O11
  4. C12H24O11
NEET (UG) 2022
4

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

  1. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
  2. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
  3. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
NEET (UG) 2022
5

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

  1. (a) - (i), (b) - (iv), (c) - (iii), (d) - (ii)
  2. (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
  3. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
  4. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
NEET (UG) 2022 (Phase 2)
6

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
NEET (UG) 2022 (Phase 2)
7

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)
8

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)
9

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
10

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
11

Identify the incorrect pair

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

All Biomolecules (Biology) PYQs →

PDFDownload Biomolecules (Biology) PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters