Photosynthesis In Higher Plants Question 184
Question: Assertion : $ CO_2 $ is transported from mesophyll cells to bundle sheath of chloroplasts in $ C_4 $ plants. Reason : RuBP is called final acceptor of $ CO_2 $ in $ C_4 $ plants.
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 the assertion is false but reason is true
Show Answer
Answer:
Correct Answer: D
Solution:
Malic acid or aspartic acid is translocated to bundle sheath cells through plasmodesmata.
Inside the bundle sheath cells they are decarboxylated (and deaminated in case of aspartic acid) to form pyruvate and $ CO_2 $ .
$ CO_2 $ is again fixed inside the bundle sheath cells through Calvin cycle.
RuBP of Calvin cycle is called secondary or final acceptor of $ CO_2 $ in $ C_4 $ plants.
BETA
