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PROTEINS AND PROTEIN METABOLISM- Part 15
See all quizzes of PROTEINS AND PROTEIN METABOLISM- Part 15 here:
1 Plasma proteins are isolated by
(A) Salting out (B) Electrophoresis
(C) Flourimetry (D) Both (A) and (B)
2. After digestion amino acids
(A) Are absorbed into portal circulation
(B) Are absorbed into lymph
(C) Are excreted to the extent of 50%
(D) Converted into glucose in the intestine
3. Cysteine has the formula:
(A) CH3SH
(B) H2N—CH2—COOH
(C) HS—CH2—CH(NH2)—COOH
(D) S—CH2—CH(NH2)—COOH
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S—CH2—CH(NH2)—COOH
4. The compound having the formula
H2N—CO—NH—CH2—CH2—CH2—CH— COOH is
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NH2
(A) Lysine (B) Glutamine
(C) Serine (D) Citrulline
5. An amino acid which contains a disulphide
bond is
(A) Lysine (B) Methionine
(C) Homocysteine (D) Cystine
6. One of the following has a phenolic group:
(A) Histidine (B) Hydroxy lysine
(C) Seratonine (D) Hydroxy proline
7. An amino acid not containing the usual—
COOH group is
(A) Alanine (B) Tryptophan
(C) Methionine (D) Taurine
8. Branched chain amino acids are
(A) Cysteine and cystine
(B) Tyrosine and Tryptophan
(C) Glycine and Serine
(D) Valine, Leucine and Isoleucine
9. A Zwitter ion is one which has in aqueous
solution:
(A) One positive charge and one negative charge
(B) Two positive charges and one negative charge
(C) Two negative charges and one positive
charge
(D) No electrical charges at all
10. The amino acid which gives yellow colour
with Ninhydrin in paper chromatography
is
(A) Tyrosine (B) Proline
(C) Tryptophan (D) Alanine
11. Hydroxylation of Proline and Lysine in a
protein is effected by
(A) Vitamin B1 (B) Vitamin B2
(C) Vitamin B6 (D) Vitamin C
12. Millon’s test is for identification of
(A) Tyrosine (B) Tryptophan
(C) Proline (D) Arginine
13. Hopkins-Cole test is for identification of
(A) Tyrosine (B) Tryptophan
(C) Arginine (D) Cysteine
52 MCQs IN BIOCHEMISTRY
14. Collagen is very rich in
(A) Glycine (B) Serine
(C) Aspartic acid (D) Glutamic acid
15. All amino acids are optically active except
(A) Glycine (B) Serine
(C) Threonine (D) Tryptophan
16. Out of 200 different amino acids form in
nature the number of amino acids present
in protein:
(A) 20 (B) 25
(C) 40 (D) 35
17. Enzyme catalyzed hydrolysis of proteins
produces amino acids of the form:
(A) D (B) L
(C) DL (D) All of these
18. The ionizable groups of amino acids are
at least.
(A) 1 (B) 2
(C) 3 (D) 4
19. The neutral amino acid is
(A) Lysine (B) Proline
(C) Leucine (D) Histidine
20. The amino acid containing hydroxyl
group:
(A) Alanine (B) Isoleucine
(C) Arginine (D) Threonine
21. The sulphur containing amino acid:
(A) Homoserine (B) Serine
(C) Methionine (D) Valine
22. The basic amino acid:
(A) Glycine (B) Leucine
(C) Histidine (D) Proline
23. The amino acid which synthesizes many
hormones:
(A) Valine (B) Phenyl alanine
(C) Alanine (D) Histidine
24. Amino acids are insoluble in
(A) Acetic acid (B) Chloroform
(C) Ethanol (D) Benzene
25. The major end product of protein nitrogen
metabolism in man is
(A) Glycine (B) Uric acid
(C) Urea (D) NH3
26. An amino acid not involved in urea cycle
is
(A) Arginine (B) Histidine
(C) Ornithine (D) Citrulline
27. NH3 is detoxified in brain chiefly as
(A) Urea (B) Uric acid
(C) Creatinine (D) Glutamine
28. In humans, NH3 is detoxified in liver as
(A) Creatinine (B) Uric acid
(C) Urea (D) Uronic acid
29. The body protein after eighteen years
(A) Remains unchanged
(B) Is decomposed only slightly at intervals of one
month
(C) Is in a constant state of flux
(D) Is used only for energy requirement
30. The only known physiological methylating
agents in the animal organism are
(A) Choline and betaine
(B) Choline and δ-adenosyl methionine
(C) Betaine and δ-adenyosyl methionine
(D) Dimehtyl glycine and betaine
