Respiratory Quotient (RQ) Basics — NEET Biology
📚 Practice ConceptRQ = volume of CO2 evolved / volume of O2 consumed
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.
View solution & NCERT explanation
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).
What does NCERT say about RQ volume CO2 evolved?
Has this concept appeared in NEET?
Which chapter is this from?
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.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.