Tag: respiratory quotient

Questions Related to respiratory quotient

The respiratory quotient during cellular respiration would depend upon

biology respiration and energy transfer respiratory quotient-basic respiration-plants respiratory quotient

  1. Amount of $CO _{2}$ released

  2. Amount of $O _{2}$ utilized

  3. The nature of enzyme in invoked

  4. Nature of substrate

  5. Both (a) and (b)

Show answer
Correct Option: D
Explanation:

The respiratory quotient (R.Q) is the ration of the volume of the CO$ _{2}$ released to the volume of the O$ _{2}$ utilized by a substrate during the process of respiration. It solely depends on the nature of the substrate. The R.Q. reflect the nature of the substrate, for example, R.Q. 1 indicated that glucose is the respiratory substrate.

Hence, the correct answer is 'Nature of substrate'.

Respiratory quotient (R. Q.) is defined as the

biology respiration and energy transfer respiratory quotient-basic respiration-plants respiratory quotient

  1. Vol. of $O _{2}$ / vol. of $CO _{2}$

  2. Vol. of $CO _{2}$ / vol. of $O _{2}$

  3. Vol. of $O _{2}$ / vol. of $N _{2}$

  4. Vol. of $N _{2}$ / vol. of $CO _{2}$

Show answer
Correct Option: B
Explanation:

The volume of carbon dioxide released and oxygen consumed in the process of respiration is called as respiratory quotient or R.Q of that substrate.

R.Q. stands for

biology respiration and energy transfer respiratory quotient-basic respiration-plants respiratory quotient

  1. Resistance coefficient

  2. Replicase concentration

  3. Respiratory quotient

  4. Reticular concentration

Show answer
Correct Option: C
Explanation:

Respiratory quotient (RQ) is the ratio of the volume of carbon dioxide released to the volume of oxygen taken in respiration in the given period of time at standard temperature and pressure. 

RQ = CO2 eliminated / O2 consumed

Name of the substance Respiratory Quotient
Carbohydrates 1
Proteins 0.8 - 0.9
Triolein 0.7
Tripalmitin (Fat) 0.7
Malic acid 1.33
Tartaric acid 1.6
Oxalic acid 4.0

Thus, the correct answer is option C. 


Respiratory quotient is expressed as which of the following equations?

biology respiration and energy transfer respiratory quotient-basic respiration-plants respiratory quotient

  1. $O _2/CO _2$

  2. $CO _2/O _2$

  3. $O _2/H _2O$

  4. $CO _2 - O _2$

Show answer
Correct Option: B
Explanation:

During aerobic respiration, $O _2$ is consumed and $CO _2$ is released. The ratio of the volume of $CO _2$ evolved to the volume of $O _2$ consumed in respiration is called the respiratory quotient (R.Q) or respiratory ratio.  Thus the following expression is used to calculate the value of R.Q.
RQ= volume of $CO _2$ evolved/ volume of $O _2$ consumed.