NEETChemistryBiomolecules
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Lysine is classified as an essential, basic amino acid. Reason (R): It cannot be synthesized in the human body and contains more amino groups than carboxyl groups in its structure. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
Lysine is an essential amino acid because it cannot be synthesized in the human body and must be obtained through diet. It is classified as a basic amino acid because its chemical structure contains more amino groups (two - NH ₂ groups) than carboxyl groups (one - COOH group). Therefore, both Assertion and Reason are correct, and the Reason correctly explains the Assertion. Answer: Both (A) and (R) are correct and (R) is the correct explanation of (A)