Explore topic-wise MCQs in Biochemistry.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following statements about gluconeogenesis is correct?

A. Pyruvate is first converted to phosphoenolpyruvate by phosphoenolpyruvate carboxykinase
B. Fructose 1, 6-biphosphatase converts fructose 1, 6-bisphosphate into fructose 1-phosphate
C. Glucose 6-phosphatase hydrolyzes glucose 6-phosphate to release glucose into the blood
D. Glucose 6-phosphatase hydrolyzes glucose 6-phosphate and is found in liver and muscle
Answer» D. Glucose 6-phosphatase hydrolyzes glucose 6-phosphate and is found in liver and muscle
2.

What is the main source of glucose carbons for gluconeogenesis?

A. Guanine
B. Alanine
C. Cysteine
D. Threonine
Answer» C. Cysteine
3.

Ethanol is oxidized to acetaldehyde in the liver cytoplasm by ____________

A. Alcohol dehydrogenase
B. Alcohol carboxylase
C. Pyruvate carboxylase
D. Pyruvate kinase
Answer» B. Alcohol carboxylase
4.

Formation of one molecule of glucose from pyruvate requires ____________

A. 4 ATP, 2 GTP and 2 NADH
B. 3 ATP, 2 GTP and 2 NADH
C. 4 ATP, 1 GTP and 2 NADH
D. 2 ATP, 2 GTP and 2 NADH
Answer» B. 3 ATP, 2 GTP and 2 NADH
5.

Which of the following organisms cannot convert acetyl-coA derived from fatty acids into glucose?

A. Animals
B. Plants
C. Bacteria
D. Virus
Answer» B. Plants
6.

Gluconeogenesis involves the conversion of ____________

A. Glucose to pyruvate
B. Pyruvate to glucose
C. Phosphoenolpyruvate to glucose
D. Pyruvate to fructose
Answer» C. Phosphoenolpyruvate to glucose
7.

Oxaloacetate is reduced to malate by ____________

A. Pyruvate carboxylase
B. Malate dehydrogenase
C. Pyruvate kinase
D. Phosphofructokinase-1
Answer» C. Pyruvate kinase
8.

Which enzyme catalyzes the conversion of pyruvate to oxaloacetate?

A. Pyruvate carboxylase
B. Pyruvate dehydrogenase
C. Pyruvate kinase
D. Phosphofructokinase-1
Answer» B. Pyruvate dehydrogenase
9.

THE_MAIN_SOURCE_OF_GLUCOSE_CARBONS_FOR_GLUCONEOGENESIS_IS?$

A. Guanine
B. Alanine
C. Cysteine
D. Threonine
Answer» C. Cysteine
10.

Which of the following statements about gluconeogenesis is correct?$

A. Pyruvate is first converted to phosphoenolpyruvate by phosphoenolpyruvate carboxykinase
B. Fructose 1, 6-biphosphatase converts fructose 1, 6-bisphosphate into fructose 1-phosphate
C. Glucose 6-phosphatase hydrolyzes glucose 6-phosphate to release glucose into the blood
D. Glucose 6-phosphatase hydrolyzes glucose 6-phosphate and is found in liver and muscle
Answer» D. Glucose 6-phosphatase hydrolyzes glucose 6-phosphate and is found in liver and muscle
11.

Ethanol is oxidized to acetaldehyde in the liver cytoplasm b?

A. Alcohol dehydrogenase
B. Alcohol carboxylase
C. Pyruvate carboxylase
D. Pyruvate kinase
Answer» B. Alcohol carboxylase
12.

Formation of one molecule of glucose from pyruvate requires

A. 4 ATP, 2 GTP and 2 NADH
B. 3 ATP, 2 GTP and 2 NADH
C. 4 ATP, 1 GTP and 2 NADH
D. 2 ATP, 2 GTP and 2 NADH
Answer» B. 3 ATP, 2 GTP and 2 NADH
13.

Which of the following organisms cannot covert acetyl-coA derived from fatty acids into glucose?

A. Animals
B. Plants
C. Bacteria
D. Virus
Answer» B. Plants
14.

Gluconeogenesis involves conversion of

A. Glucose to pyruvate
B. Pyruvate to glucose
C. Phosphoenolpyruvate to glucose
D. Pyruvate to fructose
Answer» C. Phosphoenolpyruvate to glucose
15.

Oxaloacetate is reduced to malate by

A. Pyruvate carboxylase
B. Malate dehydrogenase
C. Pyruvate kinase
D. Phosphofructokinase-1
Answer» C. Pyruvate kinase
16.

The enzyme which catalyzes the conversion of pyruvate to oxaloacetate

A. Pyruvate carboxylase
B. Pyruvate dehydrogenase
C. Pyruvate kinase
D. Phosphofructokinase-1
Answer» B. Pyruvate dehydrogenase
17.

Which of the following statements is false about gluconeogenesis?

A. From the hydrolysis of tri-acyl-glycerol, fatty acids can be used as a carbon source
B. From red blood cells, lactate can be used as a carbon source
C. From the hydrolysis of tri-acyl-glycerol, glycerol is converted to glucose in gluconeogenesis
D. From muscle vigorous muscle activity, lactate can be used as a carbon source
Answer» B. From red blood cells, lactate can be used as a carbon source
18.

Which of the following is not an important precursor of glucose in animals?

A. Lactate
B. Pyruvate
C. Glycerol
D. Glucose 6-phosphate
Answer» E.