Biochemistry in Biotechnology MCQ Questions & Answers

1

Which one of the following is INCORRECT about protein structures?

A) A protein fold is stabilized by favorable noncovalent interactions B) All parts of a fold can be classified as helices, strands or turns C) Two non-covalent atoms cannot be closer than the sum of their van der Waals radii D) The peptide bond is nearly planar

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

2

Which one of the following amino acids has three ionizable groups?

A) Glycine B) Leucine C) Valine D) Lysine

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

3

During lactic acid fermentation, net yield of ATP and NADH per mole of glucose is

A) 2 ATP and 2 NADH B) 2 ATP and 0 NADH C) 4 ATP and 2 NADH D) 4 ATP and 0 NADH

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

4

The reactions leading to the formation of amino acids from the TCA cycle intermediates are

A) Carboxylation B) Isomerization C) Transamination D) Decarboxylation

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

5

The catalytic efficiency for an enzyme is defined as

A) $${K_{cat}}$$ B) $$\frac{{{V_{\max }}}}{{{k_{cat}}}}$$ C) $$\frac{{{k_{cat}}}}{{{K_M}}}$$ D) $$\frac{{{K_{cat}}}}{{{v_{\max }}}}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

6

Which of the following types of molecules act as biological catalysts?
P. Protein
Q. RNA
R. Phospholipid

A) P and Q only B) P and R only C) Q and R only D) P, Q and R

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

7

Which one of the following amino acids has the highest probability to be found on the surface of a typical globular protein in aqueous environment?

A) Ala B) Val C) Arg D) Ile

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

8

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: A very low amount of inhibitor can act as an activator for allosteric enzymes.
Reason: Allosteric enzymes follow Michaelis-Menten kinetics.

A) Both (A) and (R) are true and (R) is the correct reason for (A) B) Both (A) and (R) are true but (R) is not the correct reason for (A) C) (A) is true but (R) is false D) (A) is false but (R) is true

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

9

During photorespiration under low CO₂ and high O₂ levels, O₂ reacts with ribulose 1, 5-bisphosphate to yield

A) One molecule each of 3-phosphoglycerate and 2-phosphoglycolate B) Two molecules of 3-phosphoglycerate C) Two molecules of 2-phosphoglycolate D) One molecule each of 3-phosphoglycerate and glyoxylate

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

10

The activity of an enzyme is expressed in International Units (IU). However, the SI unit for enzyme activity is Katal. One Katal is

A) 1.66 × 10⁴ IU B) 60 IU C) 6 × 10⁷ IU D) 10⁶ IU

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Biochemistry in Biotechnology MCQ Questions & Answers | Biotechnology