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PROTEINS AND PROTEIN METABOLISM- Part 2
See all quizzes of PROTEINS AND PROTEIN METABOLISM- Part 2 here:
1. Which of the following is a tripeptide?
(A) Anserine (B) Oxytocin
(C) Glutathione (D) Kallidin
PROTEINS AND PROTEIN METABOLISM 29
2. A peptide which acts as potent smooth
muscle hypotensive agent is
(A) Glutathione (B) Bradykinin
(C) Tryocidine (D) Gramicidin-s
3. A tripeptide functioning as an important
reducing agent in the tissues is
(A) Bradykinin (B) Kallidin
(C) Tyrocidin (D) Glutathione
4. An example of metalloprotein is
(A) Casein (B) Ceruloplasmin
(C) Gelatin (D) Salmine
5. Carbonic anhydrase is an example of
(A) Lipoprotein (B) Phosphoprotein
(C) Metalloprotein (D) Chromoprotein
6. An example of chromoprotein is
(A) Hemoglobin (B) Sturine
(C) Nuclein (D) Gliadin
7. An example of scleroprotein is
(A) Zein (B) Keratin
(C) Glutenin (D) Ovoglobulin
8. Casein, the milk protein is
(A) Nucleoprotein (B) Chromoprotein
(C) Phosphoprotein (D) Glycoprotein
9. An example of phosphoprotein present
in egg yolk is
(A) Ovoalbumin (B) Ovoglobulin
(C) Ovovitellin (D) Avidin
10. A simple protein found in the nucleoproteins
of the sperm is
(A) Prolamine (B) Protamine
(C) Glutelin (D) Globulin
11. Histones are
(A) Identical to protamine
(B) Proteins rich in lysine and arginine
(C) Proteins with high molecular weight
(D) Insoluble in water and very dilute acids
12. The protein present in hair is
(A) Keratin (B) Elastin
(C) Myosin (D) Tropocollagen
13. The amino acid from which synthesis of
the protein of hair keratin takes place is
(A) Alanine (B) Methionine
(C) Proline (D) Hydroxyproline
14. In one molecule of albumin the number
of amino acids is
(A) 510 (B) 590
(C) 610 (D) 650
15. Plasma proteins which contain more than
4% hexosamine are
(A) Microglobulins (B) Glycoproteins
(C) Mucoproteins (D) Orosomucoids
16. After releasing O2 at the tissues,
hemoglobin transports
(A) CO2 and protons to the lungs
(B) O2 to the lungs
(C) CO2 and protons to the tissue
(D) Nutrients
17. Ehlers-Danlos syndrome characterized by
hypermobile joints and skin abnormalities
is due to
(A) Abnormality in gene for procollagen
(B) Deficiency of lysyl oxidase
(C) Deficiency of prolyl hydroxylase
(D) Deficiency of lysyl hydroxylase
18. Proteins are soluble in
(A) Anhydrous acetone(B) Aqueous alcohol
(C) Anhydrous alcohol (D) Benzene
19. A cereal protein soluble in 70% alcohol
but insoluble in water or salt solution is
(A) Glutelin (B) Protamine
(C) Albumin (D) Gliadin
20. Many globular proteins are stable in
solution inspite they lack in
(A) Disulphide bonds (B) Hydrogen bonds
(C) Salt bonds (D) Non polar bonds
21. The hydrogen bonds between peptide
linkages of a protein molecules are interfered
by
(A) Guanidine (B) Uric acid
(C) Oxalic acid (D) Salicylic acid
22. Globular proteins have completely folded,
coiled polypeptide chain and the axial
ratio (ratio of length to breadth) is
(A) Less than 10 and generally not greater than
3–4
(B) Generally 10
(C) Greater than 10 and generally 20
(D) Greater than 10
23. Fibrous proteins have axial ratio
(A) Less than 10
(B) Less than 10 and generally not greater than
3–4
(C) Generally 10
(D) Greater than 10
24. Each turn of α-helix contains the amino
acid residues (number):
(A) 3.6 (B) 3.0
(C) 4.2 (D) 4.5
25. Distance traveled per turn of α−helix in
nm is
(A) 0.53 (B) 0.54
(C) 0.44 (D) 0.48
26. Along the α-helix each amino acid residue
advances in nm by
(A) 0.15 (B) 0.10
(C) 0.12 (D) 0.20
27. The number of helices present in a
collagen molecule is
(A) 1 (B) 2
(C) 3 (D) 4
28. In proteins the α-helix and β-pleated sheet
are examples of
(A) Primary structure (B) Secondary structure
(C) Tertiary structure (D) Quaternary structure
29. The a-helix of proteins is
(A) A pleated structure
(B) Made periodic by disulphide bridges
(C) A non-periodic structure
(D) Stabilised by hydrogen bonds between NH
and CO groups of the main chain
30. At the lowest energy level α-helix of
polypeptide chain is stabilised
(A) By hydrogen bonds formed between the H of
peptide N and the carbonyl O of the residue
(B) Disulphide bonds
(C) Non polar bonds
(D) Ester bonds
