UPSC Exams

Protein Synthesis Quiz

protein questions

Protein Questions and answers:

Ques. The site of protein digestion is
(a) Gullet
(b) Stomach
(c) Small intestine
(d) Oral cavity
Ans. (b)

Ques. The proteins which are insoluble in water are
(a) Fibrous proteins
(b) Globular proteins
(c) Both (a) and (b)
(d) None of these
Ans. (a)

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Ques. Irreversible precipitation of proteins is called
(a) Denaturation
(b) Hydrolysis
(c) Rearrangement
(d) Electrophoresis
Ans. (a)

Ques. The proteins with a prosthetic group are called
(a) Pseudo proteins
(b) Complex proteins
(c) Conjugated proteins
(d) Polypeptides
Ans. (c)

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Ques. Proteins are hydrolysed by enzymes into
(a) Dicarboxylic acids
(b) Hydroxy acids
(c) Amino acids
(d) Aromatic acids
Ans. (c)

Ques. Proteins when heated with conc. HNO3 give a yellow colour. This is
(a) Oxidising test
(b) Xanthoprotic test
(c) Hoppe’s test
(d) Acid-base test
Ans. (b)

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Ques. In which of the following proteins are absent
(a) Pancreatic juice
(b) Saliva
(c) Bile
(d) Intestinal juice
Ans. (c)

Ques. Trypsin is a digestive enzyme which occurs in mammals and digests
(a) Starch in buccal cavity in an alkaline medium
(b) Protein in stomach in an acidic medium
(c) Protein in duodenum in an acidic medium
(d) Protein in duodenum in an alkaline medium
Ans. (d)

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Ques. The exact sequence of events during digestion of protein is
(a) Proteins -> peptones -> acid metaproteins and peptides
(b) Proteins -> proteoses and peptones -> peptides -> amino acids
(c) Proteins -> acid metaproteins -> proteoses -> amino acids -> peptides
(d) Proteins -> primary proteins -> peptides -> amino acids
Ans. (b)

Ques. Which one of the following enzymes initiates protein digestion
(a) Aminopeptidase
(b) Carboxypeptidase
(c) Trypsin
(d) Pepsin
Ans. (d)

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Ques. The smallest structural units of proteins are called
(a) Amino acids
(b) Peptides
(c) Proteoses
(d) Peptones
Ans. (a)

Ques. Proteins are built up of
(a) Dicarboxylic acids
(b) Amino acids
(c) Alcohols
(d) Hydroxy acids
Ans. (b)

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