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VITAMINS- Part 6
See all quizzes of VITAMINS- Part 6 here:
1 Methylcobalamin is required for formation
of
(A) Serin from glycine
(B) Glycine from serine
(C) Methionine from homocysteine
(D) All of these
2. Absorption of Vitamin B12 requires the
presence of
(A) Pepsin (B) Hydrochloric acid
(C) Intrinsic factor (D) Boh (B) and (C)
3. Intrinsic factor is chemically a
(A) Protein
(B) Glycoprotein
(C) Mucopolysaccaride
(D) Peptide
4. Chemically, Extrinsic Factor of Castle is a
(A) Mucoprotein
(B) Glycoprotein
(C) Mucopolysaccharide
(D) Cyanocobalaminm
5. Vitamin B12 is
(A) Not stored in the body
(B) Stored in bone marrow
(C) Stored in liver
(D) Stored in RE cells
6. Vitamin B12 is transported in blood by
(A) Albumin (B) Transcortin
(C) Transcobalamin I (D) Transcobalamin II
7. Vitamin B12 is synthesized by
(A) Bacteria only (B) Plants only
(C) Animals only (D) Both (A) and (C)
8. Deficiency of vitamin B12 can occur because
of
(A) Decreased intake of vitamin B12
(B) Atrophy of gastric mucosa
(C) Intestinal malabsorption
(D) All of these
9. Deficiency of vitamin B12 can be diagonised
by
(A) Carr-Price reaction
(B) Ames assay
(C) Watson-Schwartz test
(D) Schilling test
10. Gastyrectomy leads to megaloblastic
anaemia within a few
(A) Days (B) Weeks
(C) Months (D) Years
11. Ascorbic acid is required to synthesise all
of the following except
(A) Collagen (B) Bile acids
(C) Bile pigments (D) Epinephrine
12. Vitamin C enhances the intestinal
absorption of
(A) Potassium (B) Iodine
(C) Iron (D) None of these
13. Vitamin C activity is present in
(A) D-Ascorbic acid
(B) D-Dehydroascorbic acid
(C) L-Ascorbic acid
(D) Both A and B
14. Vitamin C is required for the synthesis of
(A) Bile acids from cholesterol
(B) Bile salts from bile acids
(C) Vitamin D from cholesterol
(D) All of these
15. Deficiency of vitamin C causes
(A) Beriberi
(B) Pellagra
(C) Pernicious anaemia
(D) Scurvy
16. An early diagnosis of vitamin C deficiency
can be made by
(A) Measuring plasma ascorbic acid
(B) Measuring urinary ascorbic acid
(C) Ascorbic acid saturation test
(D) All of these
17. Daily requirement of vitamin C in adults
is about
(A) 100 mg (B) 25 mg
(C) 70 mg (D) 100 mg
18. The vitamin having the highest daily
requirement among the following is
(A) Thiamin (B) Ribovflavin
(C) Pyridoxine (D) Ascorbic acid
19. Anaemia can occur due to the deficiency
of all the following except
(A) Thiamin (B) Pyridoxine
(C) Folic acid (D) Cyanocobalamin
20. A vitamin which can be synthesized by
human beings is
(A) Thiamin (B) Niacin
(C) Folic acid (D) Cyanocobalamin
21. Laboratory diagnosis of vitamin B12
deficiency can be made by measuring the
urinary excretion of
(A) Xanthurenic acid
(B) Formiminoglutamic acid
(C) Methylmalonic acid
(D) Homogentisic acid
22. The molecule of vitamin A1 contains
(A) Benzene ring (B) β-Ionone ring
(C) β-Carotene ring (D) None of these
23. Precursor of Vitamin A is
(A) α-Carotene (B) β-Carotene
(C) γ-Carotene (D) All of these
24. Two molecules of vitamin A can be formed
from 1 molecule of
(A) α-Carotene (B) β-Carotene
(C) γ-Carotene (D) All of these
25. Conversion of β-carotene into retinal
requires the presence of
(A) β-Carotene dioxygenase
(B) Bile salts
(C) Molecular oxygen
(D) All of these
26. Conversion of retinal into ritonal requires
the presence of
(A) NADH (B) NADPH
(C) FADH2 (D) Lipoic acid
27. Retinal is converted into retinoic acid in
the presence of
(A) Retinal oxidase (B) Retinal carboxylase
(C) Retinene reductase(D) Spontaneously
28. Vitamin A absorbed in intestine is
released into
(A) Portal circulation (B) Lacteals
(C) Both (A) and (B) (D) None of these
29. Vitamin A is stored in the body in
(A) Liver
(B) Adipose tissue
(C) Reticuloendothelial cells
(D) All of these
30. Rhodopsin contains opsin and
(A) 11-cis-retinal (B) 11-trans-retinal
(C) All-cis-retinal (D) All trans-retinal
