Biochemistry in Biotechnology MCQs

Question 1

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

Accepted Answer

6 × 107 IU

Answer

1.66 × 104 IU

Answer

60 IU

Answer

106 IU

Question 2

The molarity of water in a water: ethanol mixture (15 : 85, v/v) is approximately

Accepted Answer

8.5

Answer

0.85

Answer

5.55

Answer

55.5

Question 3

The product(s) resulting from the hydrolysis of maltose is/are

Accepted Answer

A mixture of α-D-Glucose and β-D-Glucose

Answer

A mixture of D-Glucose and L-Glucose

Answer

α-D-Glucose only

Answer

β-D-Glucose only

Question 4

Match the vitamins in Group I with the processes/ reactions in Group II. Group I Group II P. Pantothenic acid 1. Electron transport Q. Vitamin B2 2. Transfer of 1-C units R. Vitamin B6 3. Decarboxylation S. Folic acid 4. Fatty acid metabolism 5. Hydrolysis

Accepted Answer

P-4, Q-1, R-3, S-2

Answer

P-5, Q-2, R-4, S-1

Answer

P-4, Q-2, R-1, S-3

Answer

P-2, Q-1, R-3, S-5

Question 5

An alternative to glycolysis pathway is

Accepted Answer

Pentose phosphate pathway

Answer

Glyoxylate pathway

Answer

Citric acid cycle

Answer

Gluconeogenesis

Question 6

Disaccharide molecules that contain β(1→ 4) glycosidic linkage are

Accepted Answer

Lactose and cellobiose

Answer

Sucrose and maltose

Answer

Sucrose and isomaltose

Answer

Maltose and isomaltose

Question 7

The dissociation constant Kd for ligand binding to the receptor is 10-7 M. The concentration of ligand required for occupying 10% of receptors is

Accepted Answer

10-8 M

Answer

10-6 M

Answer

10-7 M

Answer

10-9 M

Question 8

Which one of the following metabolic processes in mammalian cells does NOT occur in the mitochondria?

Accepted Answer

Glycolysis

Answer

Citric acid cycle

Answer

Oxidative phosphorylation

Answer

Fatty acid β-oxidation

Question 9

The ΔG° for the oxidation of NADH by FAD is

Accepted Answer

-18.5 kJ mol-1

Answer

-9.25 kJ mol-1

Answer

-103.04 kJ mol-1

Answer

+51.52 kJ mol-1