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CARBOHYDRATES AND CARBOHYDRATE METABOLISM- Part 8
See all quizzes of CARBOHYDRATES AND CARBOHYDRATE METABOLISM- Part 8 here:
1 The number of ATP produced in the
succinate dehydrogenase step is
(A) 1 (B) 2
(C) 3 (D) 4
2. Which of the following reaction gives
lactose?
(A) UDP galactose and glucose
(B) UDP glucose and galactose
(C) Glucose and Galactose
(D) Glucose, Galactose and UTP
3. UDP Glucuronic acid is required for the
biosynthesis of
(A) Chondroitin sulphates
(B) Glycogen
(C) Lactose
(D) Starch
4. Which one of the following can covert
glucose to vitamin C?
(A) Albino rats (B) Humans
(C) Monkeys (D) Guinea pigs
5. Which one of the following cannot convert
glucose to Vitamin C?
(A) Albino rats (B) Dogs
(C) Monkeys (D) Cows
6. Transketolase has the coenzyme:
(A) NAD+ (B) FP
(C) TPP (D) Pyridoxol phosphate
7. Two conditions in which gluconeogenesis
is increased are
(A) Diabetes mellitus and atherosclerosis
(B) Fed condition and thyrotoxicosis
(C) Diabetes mellitus and Starvation
(D) Alcohol intake and cigarette smoking
8. Acetyl CoA is not used for the synthesis
of
(A) Fatty acid (B) Cholesterol
(C) Pyruvic acid (D) Citric acid
9. The total glycogen content of the body is
about ______ gms.
(A) 100 (B) 200
(C) 300 (D) 500
10. The total Glucose in the body is ________
gms.
(A) 10–15 (B) 20–30
(C) 40–50 (D) 60–80
11. Pyruvate kinase requires ______ ions for
maximum activity.
(A) Na+ (B) K+
(C) Ca2+ (D) Mg2+
12. ATP is ‘wasted’ in Rapoport-Lueberring
cycle in RBCs as otherwise it will inhibit
(A) Phosphoglucomutase
(B) Phosphohexo isomerase
(C) Phosphofructo kinase
(D) Phosphoenol pyruvate carboxy kinase
13. The following co-enzyme is needed for the
oxidative decarboxylation of ketoacids:
(A) NADP+ (B) TPP
(C) Folate coenzyme (D) Biotin coenzyme
14. Synthesis of Glucose from amino acids is
termed as
(A) Glycolysis (B) Gluconeogenesis
(C) Glycogenesis (D) Lipogenesis
15. The following examples are important
heteropolysaccharides except
(A) Amylopectin (B) Heparin
(C) Peptidoglycan (D) Hyaluronic acid
16. Whcih of the following features are
common to monosaccharides?
(A) Contain asymmetric centres
(B) Are of 2 types – aldoses and ketoses
(C) Tend to exist as ring structures in solution
(D) Include glucose, galactose and raffinose
17. Polysaccharides
(A) Contain many monosaccharide units which
may or may not be of the same kind
(B) Function mainly a storage or structural
compounds
(C) Are present in large amounts in connective
tissue
(D) All of these
18. The absorption of glucose in the digestive
tract
(A) Occurs in the small intestine
(B) Is stimulated by the hormone Glucagon
(C) Occurs more rapidly than the absorption of
any other sugar
(D) Is impaired in cases of diabetes mellitus
19. UDP-Glucose is converted to UDPGlucuronic
acid by
(A) ATP (B) GTP
(C) NADP+ (D) NAD+
20. The enzymes involved in Phosphorylation
of glucose to glucose 6- phosphate are
(A) Hexokinase
(B) Glucokinase
(C) Phosphofructokinase
(D) Both (A) and (B)
21. In conversion of Lactic acid to Glucose,
three reactions of Glycolytic pathway are
circumvented, which of the following
enzymes do not participate?
(A) Pyruvate Carboxylase
(B) Phosphoenol pyruvate carboxy kinase
(C) Pyruvate kinase
(D) Glucose-6-phosphatase
22.Sufficient energy required to produce 3
ATP from 3 ADP and 3 pi is
(A) –21,900 cal (B) 29,900 cal
(C) 31,900 cal (D) 39,900 cal
23. The free energy change, AG
(A) Is directly proportional to the standard free
energy change, AG
(B) Is equal to zero at equilibrium
(C) Can only be calculated when the reactants
and products are present at 1mol/1
concentrations
(D) Is equal to –RT in keq
24. Under standard conditions
(A) The free energy change ΔG°, is equal to 0
(B) The standard free energy change ΔG, is
equal to 0
(C) The free energy change, ΔG°, is equal to the
standard free energy change, ΔG°
(D) Keq is equal to 1
25. An uncoupler of oxidative phosphorylation
such as dinitrophenol
(A) Inhibits electron transport and ATP synthesis
(B) Allow electron transport to proceed without
ATP synthesis
(C) Inhibits electron transport without impairment
of ATP synthesis
(D) Specially inhibits cytochrome b
26. All of the following statements about the
enzymic complex that carries out the
synthesis of ATP during oxidative
phosphorylation are correct except
(A) It is located on the matrix side of the inner
mitochondrial membrane
(B) It is inhibited by oligomycin
(C) It can exhibit ATPase activity
(D) It can bind molecular O2
27. Glucokinase
(A) Is widely distributed and occurs in most
mammalian tissues
(B) Has a high km for glucose and hence is
important in the phosphorylation of glucose
primarily after ingestion of a carbohydrate
rich meal
(C) Is widely distributed in Prokaryotes
(D) None of these
28. The reaction catalysed by phosphofructokinase
(A) Is activated by high concentrations of ATP and
citrate
(B) Uses fruitose-1-phosphate as substrate
(C) Is the rate-limiting reaction of the glycolytic
pathway
(D) Is inhibited by fructose 2, 6-bisphosphate
29. Compared to the resting state, vigorously
contracting muscle shows
(A) An increased conversion of pyruvate to lactate
(B) Decreased oxidation of pyruvate of CO2 and
water
(C) A decreased NADH/NAD+ ratio
(D) Decreased concentration of AMP
30. Which one of the following would be
expected in pyruvate kinase deficiency?
(A) Increased levels of lactate in the R.B.C
(B) Hemolytic anemia
(C) Decreased ratio of ADP to ATP in R.B.C
(D) Increased phosphorylation of Glucose to
Glucose-6-phosphate
31. Which one of the following statements
concerning glucose metabolism is correct?
(A) The conversion of Glucose to lactate occurs
only in the R.B.C
(B) Glucose enters most cells by a mechanism in
which Na+ and glucose are co-transported
(C) Pyruvate kinase catalyses an irreversible
reaction
(D) An elevated level of insulin leads to a
decreased level of fructose 2, 6-bisphosphate
in hepatocyte
