Class 11 · Respiration in Plants

Respiratory Quotient with Fats — NEET Biology

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📖 NCERT Source

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:

NCERT Biology · Class 11 · Chapter 12 · Paragraph 49
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QuestionPractice Question

Assertion (A): Different respiratory substrates have different respiratory quotients. Reason (R): When fats are used in respiration, the RQ is greater than 1.

📖 Solution & NCERT Explanation
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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).

❓ Frequently Asked Questions
What does NCERT say about When fats are used?
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:
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
Which chapter is this from?
Respiration in Plants, Class 11 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
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