Respiration In Plants — BIOLOGY STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYRespiration In Plants3 Marks
Question
Define RQ. What is its value for fats?
✓
Answer
The ratio of the volume of $\mathrm{CO}_2$ evolved to the volume of $\mathrm{O}_2$ consumed in respiration is called the respiratory quotient (RQ) or respiratory ratio. $\text{RQ }\frac{\text{volume of CO}_2\text{ evolved}}{\text{volume of O}_2\text{ consumed}}$ The value of respiratory quotient depends on the type of respiratory substrate. Its value is one for carbohydrates. However, it is always less than one for fats as fats consume more oxygen for respiration than carbohydrates. For example, RQ value for tripalmitin is 0.7 which consumes 145 molecules of $\mathrm{O}_2$ for respiration while 102 molecules of $\mathrm{CO}_2$ are evolved. RQ of fats: $2(\text{C}_{51}\text{H}_{98}\text{O}_6)+145\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ }102\text{CO}_2+98\text{H}_2\text{O}+\text{energy}$ $\text{RQ of Fat}=\frac{102\text{CO}_2}{145\text{O}_2}=0.7$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.