A new experimental pesticide is being tested by a large agricultural chemical company. An unfortunate side effect in plants treated with this new product is a decrease in NADPH production in the chloroplasts. (Interestingly, reduction of NAD⁺ to NADH in the mitochondria is unaffected.) Given this observation, which of the following would you expect to observe in the chloroplasts of these plants? A)an increase in 3-phosphoglycerate levels and a decrease in RuBP production B)a decrease in 3-phosphoglycerate levels and an increase in RuBP production C)an increase in glyceraldehyde-3-phosphate production D)an increase in 3-phosphoglycerate production and an increase in RuBP production

Question

Quizplus · Accepted Answer

NADPH is crucial for the Calvin cycle in chloroplasts, specifically for the reduction of 3-phosphoglycerate (3-PGA) to glyceraldehyde-3-phosphate (G3P). A decrease in NADPH production would impair this reduction process, leading to an accumulation of 3-PGA and a consequent decrease in RuBP production, as less G3P would be available to regenerate RuBP.

A New Experimental Pesticide Is Being Tested by a Large