Class 11 · Respiration in Plants

Respiratory Quotient with Fats — NEET Biology

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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:

🖼️Related NCERT figure: Chemical equation showing tripalmitin respiration with RQ calculation (2(C₅₁H₉₈O₆) + 145O₂ ――→ 102CO₂ + 98H₂O + energy Tripalmitin RQ = 102CO₂/145O₂ = 0.7)
NCERT Biology · Class 11 · Chapter 12 · Paragraph 49
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Assertion (A): Different respiratory substrates have different respiratory quotients. Reason (R): When fats are used in respiration, the RQ is greater than 1.

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