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VITAMINS- Part 4
See all quizzes of VITAMINS- Part 4 here:
1 A molecule of CO2 is captured by biotin
when it acts as coenzyme for carboxylation
reaction. The carboxyl group is covalently
attached to
(A) A nitrogen (N1) of the biotin molecule
(B) Sulphur of thiophene ring
(C) α-Amino group of lysine
(D) α-Amino group of protein
2. Consumption of raw eggs can cause
deficiency of
(A) Biotin (B) Pantothenic acid
(C) Riboflavin (D) Thiamin
3. The cofactor or its derivative required for
the conversion of acetyl CoA to malonyl-
CoA is
(A) FAD (B) ACP
(C) NAD+ (D) Biotin
4. A cofactor required in oxidative decarboxylation
of pyruvate is
(A) Lipoate
(B) Pantothenic acid
(C) Biotin
(D) Para aminobenzoic acid
5. The central structure of B12 referred to as
corrin ring system consists of
(A) Cobalt (B) Manganese
(C) Magnesium (D) Iron
6. The central heavy metal cobalt of vitamin
B12 is coordinately bound to
(A) Cyanide group (B) Amino group
(C) Carboxyl group (D) Sulphide group
7. Vitamin B12 has a complex ring structure
(corrin ring) consisting of four
(A) Purine rings (B) Pyrimidine rings
(C) Pyrrole rings (D) Pteridine rings
8. Emperical formula of cobalamin is
(A) C63H88N12O14P.CO
(B) C61H82N12O12P.CO
(C) C61H88N12O14P.CO
(D) C63H88N14O14P.CO
9. A deficiency of vitamin B12 causes
(A) Beri-Beri
(B) Scurvy
(C) Perniciuos anemia
(D) Ricket
10. Vitamin B12 deficiency can be diagnosed
by urinary excretion of
(A) Pyruvate (B) Methylmalonate
(C) Malate (D) Lactate
11. Subacute combined degeneration of cord
is caused due to deficiency of
(A) Niacin (B) Cobalamin
(C) Biotin (D) Thiamin
12. Vitamin required for metabolism of diols
e.g. conversion of ethylene glycol to
acetaldehyde is
(A) Thiamin (B) Cobalamin
(C) Pyridoxine (D) Folic acid
13. Both folic acid and methyl cobalamin
(vitamin B12) are required in
(A) Deamination of serine
(B) Deamination of threonine
(C) Conversion of pyridoxal phosphate to
pyridoxamine phosphate
(D) Methylation of homocystein to methionine
14. Folic acid or folate consists of the
(A) Base pteridine, p-amino benzoic acid and
asparate
(B) Base purine, p-amino benzoic acid and
glutamate
(C) Base pteridine, p-amino benzoic acid and
glutamate
(D) Base purine, p-hydroxy benzoic acid and
glutamate
15. Folate as a coenzyme is involved in the
transfer and utilization of
(A) Amino group
(B) Hydroxyl group
(C) Single carbon moiety
(D) Amido group
16. Folic acid deficiency can be diagnosed by
increased urinary excretion of
(A) Methylmalonate (B) Figlu
(C) Cystathionine (D) Creatinine
17. Sulpha drugs interfere with bacterial
synthesis of
(A) Lipoate (B) Vitamin E
(C) Tetrahydrofolate (D) Ascorbic acid
108. Folate deficiency causes
(A) Microcytic anemia
(B) Hemolytic anemia
(C) Iron deficiency anemia
(D) Megaloblastic anemia
109. Thiamin is heat stable in
(A) Acidic medium (B) Alkaline medium
(C) Both (A) and (B) (D) None of these
110. Thiamin deficiency includes
(A) Mental depression (B) Fatigue
(C) Beriberi (D) All of these
111. Thiamin diphosphate is required for
oxidative decarboxylation of
(A) α-Keto acids (B) α-Amino acids
(C) Fatty acids (D) All of these
112. Loss of thiamin can be decreased by using
(A) Unpolished rice
(B) Parboiled rice
(C) Whole wheat flour
(D) All of these
113 . Daily requirement of thiamin is
(A) 0.1 mg/1,000 Calories
(B) 0.5 mg/1,000 Calories
(C) 0.8 mg/1,000 Calories
(D) 1.0 mg/1,000 Calories
114. Thiamin requirement is greater in
(A) Non-vegetarians
(B) Alcoholics
(C) Pregnant women
(D) Both B and C
115. People consuming polished rice as their
staple food are prone to
(A) Beriberi (B) Pellagra
(C) Both (A) and (B) (D) None of these
116. Riboflavin is heat stable in
(A) Acidic medium (B) Alkaline medium
(C) Neutral medium (D) Both (A) and (C)
117. FAD is a coenzyme for
(A) Succinate dehydrogenase
(B) Glycerol-3-phosphate dehydrogenase
(C) Sphingosine reductase
(D) All of these
118. Riboflavin deficiency can cause
(A) Peripheral neuritis (B) Diarrhoea
(C) Angular stomatitis (D) None of these
119. Pellagra preventing factor is
(A) Thiamin (B) Riboflavin
(C) Niacin (D) Pyridoxine
118 MCQs IN BIOCHEMISTRY
120. Niacin contains a
(A) Sulphydryl group (B) Carboxyl group
(C) Amide group (D) All of these
