When fats are used in respiration, the RQ is less than 1. Calculations for a fatty acid, tripalmitin, if used as a substrate is shown:
Assertion (A): Different respiratory substrates have different respiratory quotients. Reason (R): When fats are used in respiration, the RQ is greater than 1.
Correct answer: C — If assertion is true but reason is false.
NCERT confirms different substrates have different RQ values (Assertion true). However, NCERT states “When fats are used in respiration, the RQ is less than 1.” The Reason falsely claims RQ > 1 for fats instead of RQ < 1 (false).
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