AP BIOLOGY

PHOTOSYNTHESIS

LIGHT DEPENDENT REACTIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The thylakoid membrane becomes damaged, causing the inside of the thylakoid to mix with the stroma.Which of the following processes is likely to be most affected by this damage?
A
The reduction of NADP+ to NADPH
B
Sunlight absorption by the chloroplasts
C
The movement of electrons from photosystem II (PSII) to photosystem I (PSI)
D
ATP synthesis
Explanation: 

Detailed explanation-1: -If the thylakoid membrane becomes damaged, causing the inside of the thylakoid to mix with the stroma, there will be no electrochemical proton gradient development. This will affect the production of ATP.

Detailed explanation-2: -Therefore, if the thylakoid membrane within a chloroplast is punctured so that there is no separation between lumen and stroma of thylakoid, synthesis of ATP will be affected the most.

Detailed explanation-3: -Hence, the correct answer is ‘Synthesis of ATP’

Detailed explanation-4: -Solution : If thylakoid is punctured, then the interior of the thylakoid is no longer separated from the stroma and this leads to stoppage of ATP synthesis.

Detailed explanation-5: -What affect would a damaged thylakoid membrane have on photosynthesis? The damage would affect the flow of electrons through the mitochondria. The damage to the thylakoid would affect the splitting of the water molecule. The sodium-potassium pump would be affected by a damaged thylakoid.

There is 1 question to complete.