Question

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

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

Answer 1

Answer: (D)

organic acid

Answer 2

Respiratory Quotients $(R Q)$ 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, $C _{6} H _{6} O _{5}+3 O _{2} \rightarrow 4 CO _{3}+3 H _{2} O$
(Malic acid) $R Q=4 CO _{2} / 3 O _{2}$ or $1.3$