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  4. Respiratory Quotient MCQ - Practice Questions with Answers

Respiratory Quotient MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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  • 10 Questions around this concept.

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QuestionEASY

Which among the following has the least RQ?

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RQ of proteins, carbohydrates, fats, and organic acids are in order

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Concepts Covered - 1

Respiratory Quotient
  • During aerobic respiration, O2 is consumed and CO2 is released. 
  • The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called the respiratory quotient (RQ) or respiratory ratio
     

  • The respiratory quotient depends upon the type of respiratory substrate used during respiration.
  • When carbohydrates are used as substrate and are completely oxidised, the RQ will be 1, because equal amounts of CO2 and O2 are evolved and consumed.
     

  • When fats are used in respiration, the RQ is less than 1. Calculations for fatty acid, tripalmitin, if used as a substrate is shown:

  • When proteins are respiratory substrates the ratio would be about 0.9.
  • When organic acids are used as the respiratory substrate, the R.Q is more than one.
     

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Respiratory Quotient

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Respiratory Quotient

Biology Textbook for Class XI

Page No. : 236

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