JEE Chemistry

Proteins (Amino Acids, Structure, Denaturation): JEE Questions & Solutions

23 previous-year JEE Chemistry questions on Proteins (Amino Acids, Structure, Denaturation), each with a worked step-by-step solution.

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Previous-year questions

  1. 01Identify the correct statements. A. Arginine and Tryptophan are essential amino acids. B. Histidine does not contain heterocyclic ring in…MCQMediumJEE 2026
  2. 02The correct statements are: A. Activation energy for enzyme catalysed hydrolysis of sucrose is lower than that of acid catalysed…MCQEasyJEE 2026
  3. 03The number of possible tripeptides formed involving alanine (ala), glycine (gly) and valine (val), where no amino acid has been used more…MCQEasyJEE 2026
  4. 04In the given pentapeptide, find out an essential amino acid (Y) and the sequence present in the pentapeptide. Choose the correct answer…MCQEasyJEE 2026
  5. 05The alpha-helix and beta-pleated sheet structures of a protein are associated with its:MCQEasyJEE 2025
  6. 06Identify the essential amino acids from below: (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine Choose the correct answer from…MCQEasyJEE 2025
  7. 07Identify the correct statement among the following:MCQMediumJEE 2025
  8. 08Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.MCQEasyJEE 2025
  9. 09A dipeptide, “x”, on complete hydrolysis gives “y” and “z”; “y” on treatment with aqueous HNO₂, produces lactic acid. On the other hand,…MCQMediumJEE 2025
  10. 10Given below are two statements: Statement (I): On hydrolysis, oligo peptides give rise to fewer number of α-amino acids while proteins give…MCQEasyJEE 2025
  11. 11Which structure of protein remains intact after coagulation of egg white on boiling?MCQEasyJEE 2024
  12. 12Type of amino acids obtained by hydrolysis of proteins is:MCQEasyJEE 2024
  13. 13Total number of tripeptides possible by mixing of valine and proline is:NVAEasyJEE 2023
  14. 14Number of cyclic tripeptides formed with 2 amino acids A and B is:MCQEasyJEE 2023
  15. 15Following tetrapeptide can be represented as: (F, L, D, Y, I, Q, P are one-letter codes for amino acids)MCQEasyJEE 2023
  16. 16A short peptide on complete hydrolysis produces 3 moles of glycine (G), 2 moles of leucine (L) and 2 moles of valine (V) per mole of…NVAEasyJEE 2023
  17. 17A protein 'X' with molecular weight of 70,000 u, on hydrolysis gives amino acids. One of these amino acids isMCQEasyJEE 2023
  18. 18Match List I with List II | List I (Natural Amino acid) | List II (One Letter Code) | |---|---| | (A) Arginine | (I) D | | (B) Aspartic…MCQEasyJEE 2023
  19. 19Sulphur (S)-containing amino acids from the following are: (a) isoleucine (b) cysteine (c) lysine (d) methionine (e) glutamic acid Choose…MCQEasyJEE 2023
  20. 20The one that does not stabilize 2^° and 3^° structures of proteins is:MCQEasyJEE 2023
  21. 21In an oligopeptide named Alanylglycylphenylalanylisoleucine, the number of sp² hybridised carbons is.NVAMediumJEE 2023
  22. 22The naturally occurring amino acid that contains only one basic functional group in its chemical structure is:MCQEasyJEE 2023
  23. 23Which is not true for arginine?MCQEasyJEE 2023

Frequently asked questions

Our bank has 23 previous-year JEE Chemistry questions tagged to Proteins (Amino Acids, Structure, Denaturation), drawn from JEE papers between 2023 and 2026, including 4 from 2026 alone. Each comes with a full step-by-step solution.

Proteins (Amino Acids, Structure, Denaturation) is rated Advanced overall for JEE Chemistry. The PYQs on this page break down as 19 easy, 4 medium.

Of the 23 previous-year questions on Proteins (Amino Acids, Structure, Denaturation), 20 are multiple-choice (MCQ) and 3 are numerical-value (NVA) questions.

Based on recent paper analysis, Proteins (Amino Acids, Structure, Denaturation) is worth about 2 marks in JEE Main. It sits in Biomolecules, a Class 12 Chemistry chapter.

More Biomolecules topics

Carbohydrates (Glucose, Fructose, Sucrose…)23Nucleic Acids (DNA, RNA)5Vitamins2Hormones (Basics)2Enzymes0

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