Carbohydrates Biochemistry Set 4

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Biochemistry (Carbohydrates And Carbohydrate Metabolism Set 4)

MCQ

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1. Which of the following compound is a
positive allosteric modifier of the enzyme
pyruvate carboxylase

A) Acetyl CoA

B) ATP

C) Oxaloacetate

D) Biotin

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2. The hydrolysis of Glucose-6-P is catalysed
by a phosphatase that is not formed in
which of the following

A) Muscle

B) Small intestine

C) Kidney

D) Liver

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3. Out of 24 mols of ATP formed in TCA cycle,
2 molecules of ATP can be formed at
“substrate level” by which of the
following reaction

A) socitrate→ Oxaloacetate

B) Citric acid→ Isocitric acid

C) Succinylcat→ Succinic acid

D) Succinic acid→ Fumarate

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4. Transketolase activity is affected in

A) PABA deficiency

B) Biotin deficiency

C) Pyridoxine deficiency

D) Thiamine deficiency

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5. The following metabolic abnormalities
occur in Diabetes mellitus except

A) Decreased lipogenesis

B) Increased plasma FFA

C) Increased pyruvate carboxylase activate

D) Decreased gluconeogenesis

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6. Which of the following hormones is not
involved in carbohydrate metabolism

A) ACTH

B) Vasopressin

C) Cortisol

D) Glucogen

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7. Which of the following is a substrate for
aldolase activity in Glycolytic pathway

A) Fructose1, 6-bisphosphate

B) Glucose-6-p

C) Glyceraldehyde-3-p

D) Fructose-6-p

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8. An essential for converting Glucose to
Glycogen in Liver is

A) Lactic acid

B) CTP

C) UTP

D) GTP

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9. Pyruvate kinase requires ______ ions for
maximum activity

A) Ca2+

B) Mg2+

C) K+

D) Na+

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10. Dehydrogenases involved in HMP shunt
are specific for

A) NAD+

B) FAD

C) FMN

D) NADP+

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11. Transketolase has the coenzyme

A) NAD+

B) FP

C) TPP

D) Pyridoxol phosphate

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12. Acetyl CoA is not used for the synthesis
of

A) Cholesterol

B) Fatty acid

C) Pyruvic acid

D) Citric acid

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13. A specific inhibitor for succinate
dehydrogenase is

A) Melouate

B) Citrate

C) Arsinite

D) Cyanide

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14. . The total glycogen content of the body is
about ______ gms.

A) 300

B) 100

C) 500

D) 200

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15. A regulator of the enzyme Glycogen
synthase is

A) GTP

B) Citric acid

C) 2, 3 bisphosphoglycerate

D) Pyruvate

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16. UDP-Glucose is converted to UDPGlucuronic acid by

A) ATP

B) NAD+

C) NADP+

D) GTP

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17. Synthesis of Glucose from amino acids is
termed as

A) Glycogenesis

B) Glycolysis

C) Lipogenesis

D) Gluconeogenesis

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18. ATP is ‘wasted’ in Rapoport-Lueberring
cycle in RBCs as otherwise it will inhibit

A) Phosphohexo isomerase

B) Phosphoglucomutase

C) Phosphoenol pyruvate carboxy kinase

D) Phosphofructo kinase

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19. Most of the metabolic pathways are
either anabolic or catabolic. Which of the
following pathways is considered as
“amphibolic” in nature

A) Glycogenesis

B) TCA cycle

C) Lipolysis

D) Glycolytic pathway

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20. The “Primaquin sensitivity types of
haemolytic anaemia has been found to
relate to reduced R.B.C activity of which
enzyme

A) Glucose-6-phosphatase deficiency

B) Pyruvate kinase deficiency

C) Hexokinase deficiency

D) Glucose-6-p dehydrogenase deficiency

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21. Which of the following enzymes in Glycolytic pathway is inhibited by fluoride

A) Phosphoglycerate kinase

B) Glyceraldehyde-3-p dehydrogenase

C) Enolase

D) Pyruvate kinase

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22. Two conditions in which gluconeogenesis
is increased are

A) Diabetes mellitus and atherosclerosis

B) Fed condition and thyrotoxicosis

C) Alcohol intake and cigarette smoking

D) Diabetes mellitus and Starvation

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23. The normal resting state of humans, most
of the blood glucose burnt as “fuel” is
consumed by

A) Brain

B) Adipose tissue

C) Kidneys

D) Liver

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24. A substance that is not an intermediate
in the formation of D-glucuronic acid from
glucose is

A) Glucose-1-p

B) 6-Phosphogluconate

C) Glucose-6-p

D) UDP-Glucose

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25. In conversion of Lactic acid to Glucose,
three reactions of Glycolytic pathway are
circumvented, which of the following
enzymes do not participate

A) Phosphoenol pyruvate carboxy kinase

B) Pyruvate Carboxylase

C) Pyruvate kinase

D) Glucose-6-phosphatase

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26. The enzymes involved in Phosphorylation
of glucose to glucose 6- phosphate are

A) Hexokinase

B) Glucokinase

C) Phosphofructokinase

D) Both (A) and (B)

Your score is

The average score is 69%

Carbohydrates Biochemistry Set 4

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