GATE CY topic:biomolecules PYQs & Answers

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Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–7 of 7. Imported answers require independent review unless marked reviewed.

Topic practice 7 questionsPage 1 of 1

Chymotrypsin selectively cleaves a peptide at the carboxyl side of the amino acids having an aryl side chain. The tripeptide(s) formed on hydrolysis of the peptide, Val-Phe-Leu-Met-Tyr-Pro-Gly-Trp-Cys, with chymotrypsin is(are)

Your answerSelect all correct options. You can choose more than one.

Leu-Met-Tyr

Phe-Leu-Met

Pro-Gly-Trp

Tyr-Pro-Gly

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A disaccharide X does NOT show mutarotation in aqueous solution. Acidic hydrolysis of X affords two different monosaccharides. The disaccharide X is

Your answerChoose one option.

Diagram for Chemistry question 17 (figure 2)

Diagram for Chemistry question 17 (figure 3)

Diagram for Chemistry question 17 (figure 4)

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Partial hydrolysis of a pentapeptide yields all possible tripeptides and dipeptides. The dipeptides that are obtained upon hydrolysis are given below.

Val-Ala, Gln-His, Phe-Val and Ala-Gln

The total number of tripeptides obtained that contain ‘Ala’ as one of the amino acids is____ (in integer).

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Fischer presentation of D-(-)-fructose is given below.

The correct structure of

-L-(+)-fructofuranose is

Your answerChoose one option.

Diagram for Chemistry question 41 (figure 2)

Diagram for Chemistry question 41 (figure 3)

Diagram for Chemistry question 41 (figure 4)

Diagram for Chemistry question 41 (figure 5)

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A tripeptide on treatment with PhNCS (pH = 8.0) followed by heating with dilute HCl added a cyclic compound M and a dipeptide. The dipeptide on treatment with PhNCS (pH = 8.0) followed by heating with dilute HCl added a cyclic compound N and an acyclic compound O. The CORRECT sequence (from N- to C-terms) of the tripeptide is

Your answerChoose one option.

glycine-phenylalanine-valine

valine-phenylalanine-glycine

glycine-tyrosine-valine

glycine-phenylalanine-alanine

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A correct example of a nucleotide is:

Your answerChoose one option.

adenosine monophosphate (AMP)

RNA

uridine

DNA

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A tetrapeptide, made up of natural amino acids, has alanine as the N-terminal residue which is coupled to a chiral amino acid. Upon complete hydrolysis, the tetrapeptide gives glycine, alanine, phenylalanine and leucine. The number of possible sequences of the tetrapeptide is _____.

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GATE CY topic:biomolecules PYQs

How to practice topic:biomolecules

Question 51

Question 17

Question 32

Question 41

Question 14

Question 10

Question 54