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PROTEINS AND PROTEIN METABOLISM- Part 20
See all quizzes of PROTEINS AND PROTEIN METABOLISM- Part 20 here:
1. The hydrogen bonds between peptide
linkages are interfered by
(A) Guanidine (B) Uric acid
(C) Salicylic acid (D) Oxalic acid
2. The digestability of certain denatured
proteins by proteolytic enzymes
(A) Decreases (B) Increases
(C) Normal (D) None of these
3. The antigenic antibody functions of
proteins by denaturation are frequently
(A) Not changed (B) Changed
(C) Both (A) and (B) (D) None of these
4. In case of severe denaturation of protein,
there is
(A) Reversible denaturation
(B) Moderate reversible denaturation
(C) Irreversible denaturation
(D) None of these
5. When egg albumin is heated till it is
coagulated, the secondary and tertiary
structures of the proteins are completely lost
resulting in a mixture of randomly arranged
(A) Dipeptide chains (B) Tripeptide chains
(C) Polypeptide chains(D) All of these
6. In glycoproteins the carbohydrate is in the
form of disaccharide units, the number of
units are
(A) 50–100 (B) 200–300
(C) 400–500 (D) 600–700
7. The milk protein in the stomach of the
infants is digested by
(A) Pepsin (B) Trypsin
(C) Chymotrypsin (D) Rennin
8. Achylia gastrica is said to be when absence
of
(A) Pepsin only (B) Both pepsin and HCl
(C) HCl only (D) All of these
9. The pH of gastric juice become low in
(A) Hemolytic anemia (B) Pernicious anemia
(C) Both (A) and (B) (D) None of these
10. In small intestine trypsin hydrolyzes
peptide linkages containing
(A) Arginine (B) Histidine
(C) Serine (D) Aspartate
11. Chymotrypsin in the small intestine
hydrolyzes peptide linkages containing
(A) Alanine (B) Pheynl alanine
(C) Valine (D) Methionine
12. Carboxy peptidase B in the small
intestine hydrolyzes peptides containing
(A) Leucine (B) Isoleucine
(C) Arginine (D) Cysteine
13. The transport of amino acids regulated by
active processes of different numbers:
(A) 1 (B) 2
(C) 3 (D) 4
14. The third active process for amino acids
transport involves
(A) Acidic amino acids
(B) Basic amino acids
(C) Neutral amino acids
(D) Sulphur containing amino acids
15. The neutral amino acids for absorption
need
(A) TPP (B) B6 – PO4
(C) NAD+ (D) NADP+
16. If one amino acid is fed excess, the
absorption of another is
(A) Slightly accelerated
(B) Moderately accelerated
(C) Highly accelerated
(D) Retarded
17. Under normal conditions, food proteins
are generally readily digested upto the
present
(A) 67 to 73 (B) 74 to 81
(C) 82 to 89 (D) 90 to 97
18. By overheating the nutritional value of
cereal proteins is
(A) Increased (B) Decreased
(C) Unchanged (D) None of these
19. More than half of the protein of the liver
and intestinal mucosa are broken down
and resynthesised in
(A) 10 days (B) 12 days
(C) 15 days (D) 18 days
20. The half-life of antibody protein is about
(A) 4 weeks (B) 3 weeks
(C) 2 weeks (D) 1 week
21. Protein anabolism is stimulated by
(A) ACTH (B) Testosterone
(C) Glucagon (D) Epinephrine
22. The metabolism of protein is integrated
with that of carbohydrate and fat through
(A) Oxaloacetate (B) Citrate
(C) Isocitrate (D) Malate
23. The building up and breaking down of
protoplasm are concerned with the
metabolism of
(A) Carbohydrate (B) Lipid
(C) Protein (D) Minerals
24. The amino acids abstracted from the liver
are not utilized for repair or special
synthesis but are broken down to
(A) Keto acids (B) Sulphur dioxide
(C) Water (D) Ammonia
25. The unwanted amino acids abstracted
from the tissues are either used up by the
tissue or in the liver converted into
(A) Ammonia (B) Urea
(C) Ammonium salts (D) Uric acid
26. Amino acids provide the nitrogen for the
synthesis of
(A) The bases of the phospholipids
(B) Uric acid
(C) Glycolipids
(D) Chondroitin sulphates
27. The metabolism of all proteins ingested
over and above the essential requirements
is called
(A) Exogenous metabolism
(B) Endogenous metabolism
(C) Both (A) and (B)
(D) None of these
28. Sulphur containing amino acids after
catabolism produces a substance which
is excreted:
(A) SO2 (B) HNO3
(C) H2SO4 (D) H3PO4
29. Ethereal sulphate is synthesized from the
_________ amino acid.
(A) Neutral (B) Acidic
(C) Basic (D) Sulphur containing
30. The amino acids required for creatine
formation:
(A) Glycine (B) Arginine
(C) Methionine (D) All of these
