Question

⭕50 points ⭕

Refer to the given cross section of a C4 leaf and select the incorrect Option.

( For Option c and d refer to other attachment )

Answer 1

Answer:

D

Explanation:

The given croos section of the leaf represents Kranz anatomy in a C4 plant.

P are the chloroplasts of mesophyll cells, which are granal (i.e., thylakoids are stacked to from grana) and are specilasied to perform light reaction of photosynthesis, evolve O2 and produce assimilatory power [ ATP+NADPH_(2) ] .

Q are the chloroplasts of bundle sheath cells which are agranal, i.e., grana are absent and the thylakoids occur as stroma lamellae. In these chloroplasts , final fixation of CO2 takes place through calvin cycle where CO2 is fixed by RuBP in the presence of enzyme RuBisCO.

Answer 2

Answer:

The given cross section of leaf represents Kranz anatomy in a C

4

plant. P is the chloroplasts of mesophyll cells, which are granular (i.e, thylakoids are staked to form grana ) and are specialized to perform light reaction of photosynthesis, evolve O

2

and produce assimilation power (ATP+NADPH

2

).Q is the chloroplasts of bundle sheath cells which are stroma laminae. in these chloroplasts, final fixation of CO

2

takes place through Calvin cycle where CO

2

is fixed by RuBP in the presence of enzyme RuBisCO.

So, the correct answer is 'Q are the chloroplasts in which CO

2

is fixed by phosphoenol pyruvic acid to form oxaloacetic acid.'