When the pH of the stroma shifts from 7 to 8 under illumination,
A) four Calvin cycle enzymes become inactivated.
B) rubisco becomes activated.
C) disulfide bonds in ferredoxin become oxidized.
D) thioredoxin becomes oxidized.
E) ATP is hydrolyzed.

Question

Quizplus · Accepted Answer

Rubisco becomes activated when the pH of the stroma increases, as typically occurs when chloroplasts are illuminated. This pH change is part of the mechanism that regulates the Calvin cycle, enhancing the enzyme's activity in light conditions.

When the PH of the Stroma Shifts from 7 to 8