Respiration in Plants Question 56

56. Apparatus to measure rate of respiration and R.Q. is

[1992]

(a) Auxanometer

(b) Potometer

(c) Respirometer

(d) Manometer

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Answer : c

Hints & Solutions

(c) Respirometer is an instrument for measuring respiratory quotient as well as rate of respiration. A respirometer allows measurement of changes in gas volumes as organisms respire in a sealed chamber. As they respire, organisms consume $O_2$ and produce $CO_2$, which is absorbed by potassium hydroxide $(KOH)$ solution.