Photosynthesis In Higher Plants Question 172
Question: Assertion : Each molecule of ribulose-1, 5-bisphosphate fixes one molecule of $ CO_2 $ . Reason : Three molecules of NADPH and two ATP are required for fixation of one molecule of $ CO_2 $ .
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: C
Solution:
Each molecule of ribulose-1, 5-biphosphate fixes one molecule of carbon dioxide with the addition of water, thereby resulting in the formation of two molecules of 3-phosphoglyceric acid (3-PGA).
The fixation and reduction of one molecule of $ CO_2 $ requires three molecules of ATP and two of NADPH, coming from the photochemical reactions.
BETA
