Define Respiratory Quotient (RQ) and cal...

Define Respiratory Quotient (RQ) and calculate the respiratory quotient of carbohydrate.

Text Solution

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1. Respiratory quotient: The ratio of volume of `CO_(2)` evolved to the volume of `O_(2)` consumed during respiration is called respiratory quotient (RQ).
2. Respiratory quotient of carbohydrate: When carbohy- drate for example glucose `(C_(6)H_(12)O_(6))` is used as respiratory substrate the RQ is 1.
For example : `C_(6)H_(12)O_(6)+6O_(2) to 6CO_(2)+6H_(2)O+` Energy
`RQ=(6O_(2))/(6CO_(2))=1`
This is because the volume of `CO_(2)` evolved is equal to the volume of `O_(2)` consumed.

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The respiratory quotient of carbohydrate is

Unity

Greater than unity

Less than unity

Equal to five

The respiratory quotient is

`RQ=("Volume of " O_2 "evolved")/("Volume of " CO_2 "consumed")`

`RQ=("Volume of " O_2 "consumed")/("Volume of " CO_2 "evolved")`

`RQ=("Volume of " CO_2 "evolved")/("Volume of " O_2 "consumed")`

`RQ=("Volume of " CO_2 "consumed")/("Volume of " O_2 "evolved")`

Respiratory quotient (R.Q.) is

Volume of `O_(2)` evolved//Volume of `CO_(2)` consumed

Volume of `CO_(2)` evolved//Volume of `O_(2)`

Volume of `O_(2)` consumed//Volume of `CO_(2)` evolved

Volume of `CO_(2)` consumed//Volume of `O_(2)` evolved