Biochemistry Questions and Answers Part-11

1. In essential pentosuria, urine contains
a) D-Ribose
b) D-Xylulose
c) L-Xylulose
d) D-Xylose

Answer: c

2. Action of salivary amylase on starch leads to the formation of
a) Maltose
b) Maltotriose
c) Both of the above
d) Neither of these

Answer: c

3. Congenital galactosaemia can lead to
a) Mental retardation
b) Premature cataract
c) Death
d) All of the above

Answer: d

4. Uridine diphosphate glucose (UDPG) is
a) Required for metabolism of galactose
b) Required for synthesis of glucuronic acid
c) A substrate for glycogen synthetase
d) All of the above

Answer: d

5. Catalytic activity of salivary amylase requires the presence of
a) Chloride ions
b) Bromide ions
c) Iodide ions
d) All of these

Answer: a

6. The following is actively absorbed in the intestine:
a) Fructose
b) Mannose
c) Galactose
d) None of these

Answer: c

7. An amphibolic pathway among the following is
a) HMP shunt
b) Glycolysis
c) Citirc acid cycle
d) Gluconeogenesis

Answer: c

8. Cori’s cycle transfer
a) Glucose from muscles to liver
b) Lactate from muscles to liver
c) Lactate from liver to muscles
d) Pyruvate from liver to muscles

Answer: b

9. Excessive intake of ethanol increases the ratio:
a) NADH : NAD+
b) NAD+ : NADH
c) FADH2 : FAD
d) FAD : FADH2

Answer: a

10. Ethanol decreases gluconeogenesis by
a) Inhibiting glucose-6-phosphatase
b) Inhibiting PEP carboxykinase
c) Converting NAD+ into NADH and decreasing the availability of pyruvate
d) Converting NAD+ into NADH and decreasing the availability of lactate

Answer: c