Class 11 · Respiration in Plants

Respiratory Pathway: Anabolism & Catabolism — NEET Biology

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📖 NCERT Source

The respiratory pathway is an amphibolic pathway as it involves both anabolism and catabolism. The respiratory quotient depends upon the type of respiratory substance used during respiration.

NCERT Biology · Class 11 · Chapter 12 · Paragraph 55
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Assertion (A): The respiratory quotient is the ratio of CO2 evolved to O2 consumed in respiration. Reason (R): The respiratory quotient depends upon the type of respiratory substrate used during respiration.

📖 Solution & NCERT Explanation
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Correct answer: A If both assertion and reason are true and the reason is the correct explanation of the assertion.

NCERT states “The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called the respiratory quotient (RQ)” (Assertion true). NCERT also states “The respiratory quotient depends upon the type of respiratory substrate used during respiration.” The Reason explains WHY RQ is significant - because it varies with substrate type (true and explanatory).

❓ Frequently Asked Questions
What does NCERT say about respiratory pathway amphibolic pathway?
The respiratory pathway is an amphibolic pathway as it involves both anabolism and catabolism. The respiratory quotient depends upon the type of respiratory substance used during respiration.
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.

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