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Sunday, 11 February 2018

The respiratory quotient of glucose in anaerobic respiration is

  By GK Planet Team       Sunday, 11 February 2018
Q. The respiratory quotient of glucose in anaerobic respiration is

(A) One
(B) Four
(C) Infinity
(D) Less than one

Answer: One

The value of RQ is equal to 1 if carbohydrates are the respiratory substrates in aerobic respiration.

The respiratory quotient (or RQ or respiratory coefficient), is a dimensionless number used in calculations of basal metabolic rate (BMR) when estimated from carbon dioxide production. It is calculated from the ratio of carbon dioxide produced by the body to oxygen consumed by the body. Such measurements, like measurements of oxygen uptake, are forms of indirect calorimetry. It is measured using a respirometer. The Respiratory Quotient value indicates which macronutrients are being metabolized, as different energy pathways are used for fats, carbohydrates, and proteins. A value of 0.7 indicates that lipids are being metabolized, 0.8 for proteins, and 1.0 for carbohydrates. The approximate respiratory quotient of a mixed diet is 0.8. Some of the other factors that may affect the respiratory quotient are energy balance, circulating insulin, and insulin sensitivity.

It can be used in the alveolar gas equation.
The ratio of the volume of CO2 released to the volume of O2 taken in respiration is called as respiratory quotient and is denoted as R.Q.
R.Q. = Vol. of CO2 /Vol. of O2
When carbohydrates such as hexose sugars are oxidised in respiration, the value of R.Q. is 1 or unity because vol. of CO2 evolved equals to the vol. of O2 absorbed as is shown by the following equation:
C6H12O6 + 6O2 (Glucose) → 6CO2 + 6H2O
R.Q. = Vol. of CO2/ Vol. of O2 = 6/6 = 1 or unity 
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Thanks for reading The respiratory quotient of glucose in anaerobic respiration is

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