Photosynthesis In Higher Plants Question 184
Assertion : $ CO_2 $ is transported from mesophyll cells to bundle sheath cells in $ C_4 $ plants. Reason : PEPCase 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 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 final acceptor of $ CO_2 $ in $ C_4 $ plants.
BETA
