Biochemistry or biological chemistry is the study of chemical processes within and relating to living organisms

Biochemistry MCQs
Glycolysis

1. The main function of the pentose shunt is to:

(a) supply energy

(b) give the cell a back-up capability should glycolysis fail

(c) provide energy and reducing power

(d) provide pentoses and NADPH

2. End products of the pentose shunt reenter glycolysis as:

(a) glucose 6-phosphate

(b) fructose 6-phosphate + glyceraldehyde 3-phosphate

(c) fructose 1,6 bisphosphate

(d) dihydroxyacetonephosphate

3. Epinephrine triggers an increased rate of glycogen breakdown in muscle by causing:

(a) activation of hexokinase

(b) activation of glyceraldehyde 3-phosphate dehydrogenase

(c) conversion of glycogen phosphorylase b to glycogen phosphorylase a

(d) activation of pyruvate kinase

4. A coenzyme form of pantothenic acid is:

(a) lipoic acid

(b) coenzyme A (CoASH)

(c) TPP

(d) FAD

5. A coenzyme form of riboflavin is:

(a) lipoic acid

, (b) coenzyme A (CoASH)

(c) TPP

(d) FAD

6. What is the net ATP yield for the conversion of one free glucose molecule to CO2
and H2O via glycolysis and the TCA cycle (assume the malate-aspartate shuttle was
used)?

(a) 12

(b) 15

(c) 36

(d) 38

7. What is the net ATP yield for the conversion of one free glucose molecule to CO2
and H2O via glycolysis and the TCA cycle (assume the glycerol 3 phosphate shuttle
was used)?

(a) 12

(b) 15

(c) 36

(d) 38

8. What is the net ATP yield for the conversion of one molecule of acetyl CoA to CO2
and H2O via the TCA cycle?

(a) 12

(b) 15

(c) 24

(d) 30

9. What is the net ATP yield for the conversion of one molecule of pyruvate to CO2 and
H2O via the TCA cycle?

(a) 12

(b) 15

(c) 24