Class 11 · Respiration in Plants

Multiple Respiratory Substrates in Living Organisms — NEET Biology

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📖 NCERT Source

What is important to recognise is that in living organisms, respiratory substrates are often more than one; pure proteins or fats are never used as respiratory substrates.

NCERT Biology · Class 11 · Chapter 12 · Paragraph 51
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Why are pure fats or proteins rarely used as the sole respiratory substrates in living organisms?

📖 Solution & NCERT Explanation
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Correct answer: D Multiple substrates are typically used

Real cellular respiration involves a mix of carbs, fats, and proteins.

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What does NCERT say about What important to recognise?
What is important to recognise is that in living organisms, respiratory substrates are often more than one; pure proteins or fats are never used as respiratory substrates.
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
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

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