What would be the consequences of the following be on photosynthesis? These are the only ones I am stuck on!
a.) Photosystem I is not functional
b.) NADP+ is not present in the thylakoid space
a.) If Photosystem I is not functional, it would have significant consequences on photosynthesis. Photosystem I is responsible for capturing light energy and transferring it to the electron transport chain, where it helps generate ATP and reduce NADP+ to NADPH. NADPH, in turn, is crucial for the production of glucose during the Calvin cycle.
Without a functional Photosystem I, the process of capturing light energy and transferring it to the electron transport chain would be compromised. This would lead to a reduced production of ATP and a lack of NADPH, inhibiting the synthesis of glucose during the Calvin cycle. As a result, the overall rate of photosynthesis would be significantly decreased, affecting the plant's ability to produce energy and store carbohydrates.
b.) If NADP+ is not present in the thylakoid space, it would also have significant consequences on photosynthesis. NADP+ serves as an electron carrier during the light-dependent reactions of photosynthesis. It accepts electrons from Photosystem I and, together with hydrogen ions (H+), it forms NADPH.
In the absence of NADP+ in the thylakoid space, the process of converting light energy into chemical energy would be disrupted. There would be no electron acceptor for Photosystem I, and as a result, the electron transport chain would be unable to function properly. This would lead to a decreased production of ATP and a lack of NADPH. Consequently, the Calvin cycle, which relies on these energy carriers, would be hindered, reducing the plant's ability to produce glucose and negatively impacting overall photosynthesis.
In summary, the consequences of a non-functional Photosystem I and the absence of NADP+ would both result in a reduced production of ATP and NADPH. This would ultimately impair the process of converting light energy into chemical energy, leading to a decrease in glucose synthesis and a decreased rate of photosynthesis.