Respiration In Plants Question 147
Question: In some succulent plants like Opuntia the R.Q. is zero because:
Options:
A) $ CO_2 $ is released without any absorption of $ O_2 $
B) $ O_2 $ is released but $ CO_2 $ is absorbed.
C) There is often a compensation point in these plants due to thick phylloclades.
D) None of the above
Show Answer
Answer:
Correct Answer: B
Solution:
[b] In succulent plants like Opuntia there is an incomplete oxidation of the carbohydrates resulting in the formation of organic acids.
$ CO_2 $ is not released.
$ 2C_6H_{12}O_6+3O_2\to 2C_6H_{12}O_6+6H_2O+386kcal.
$ $ R.Q.=\frac{CO_2}{O_2}=\frac{3}{0}$
BETA
