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MCQEasyJEE 2023Proteins (Amino Acids, Structure, Denaturation)

JEE Chemistry 2023 Question with Solution

Match List I with List II

Table matching List I natural amino acids Arginine, Aspartic acid, Asparagine, Alanine with List II one letter codes D, N, A, R.

Choose the correct answer from the options given below:

  • A

    (A) – III, (B) – I, (C) – II (D) – IV

  • B

    (A) – IV, (B) – I, (C) – II (D) – III

  • C

    (A) – IV, (B) – I, (C) – III (D) – II

  • D

    (A) – I, (B) – III, (C) – IV (D) – II

Answer

Correct answer:A

Step-by-step solution

Standard Method

Given: A matching question between List I and List II.

Find: The correct correspondence between the natural amino acids and their one letter codes.

From the solution:

  • arginine corresponds to R
  • aspartic acid corresponds to D
  • asparagine corresponds to N
  • alanine corresponds to A

Therefore,

  • (A) Arginine →\rightarrow IV
  • (B) Aspartic acid →\rightarrow I
  • (C) Asparagine →\rightarrow II
  • (D) Alanine →\rightarrow III

This matches option A.

Therefore, the correct option is A.

Common mistakes

  • Confusing asparagine with aspartic acid. This is wrong because their one letter codes are different. Match each amino acid name carefully with its specific code.

  • Assuming the codes come from the first letter of the amino acid name. This is wrong because one letter amino acid codes are standardized symbols, not always initials. Use the accepted biochemical code list instead.

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