Question

In respiration, more than one $R.Q.$ value results from the use of

• A. glucose
• B. sucrose
• C. fat
• D. organic acid

Answer 1

Answer: (D)

Respiratory Quotients $(RQ)$ is the ratio of the volume of carbon dioxide produced to the volume of oxygen consumed in respiration over a period of time. Its value is one, zero, more than $1$ or less than $0$ .
$RQ$ slightly more than unity is found when organic acids are broken down as respiratory substrates under aerobic conditions.
For example, $C_6{H}_6{O}_5+3O_2\to 4C{O}_3+3H_{2}O$
(Malic acid) $RQ=4C{O}_2/3O_2$ or $1.3$