Question

In: Biology

Describe how the following situations would affect the next step in photosynthesis. Situations: 1. If no...

Describe how the following situations would affect the next step in photosynthesis.

Situations:

1. If no water was being absorbed.

2. If NADP+ and ADP could not become NADPH and ATP.

3. If the amount of oxygen increased.

4. If the amount of carbon dioxide decreased.

Solutions

Expert Solution

1. Water splits into oxygen, hydrogen ion and electrons. The electrons produced by the water replace the lost electrons of photosystem II and H+ ions reduces NADP to NADPH. Thus if water is not being absorbed the oxidation of photosystem II will not occur and the release of electrons and generation of NADPH will not occur. Hence electron transport chain will not be generated.

2. If NADP+ will not become NADPH and ADP will not convert into ATP the light independent reaction ( in dark) will not take place because dark reaction requires ATP and NADPH produced from light reaction.

3. During photosynthesis, Plants use water and CO2 to from glucose and oxygen. The oxygen molecule releases out through stomata. If the amount of oxygen will be increased the release of oxygen through stomata will be reduced which will ultimately reduce the uptake of CO2 and thus rate of photosynthesis will decrease.

4. If the amount of CO2 will be decreased, the availability of CO2 will be decreased for plant and thus less uptake of CO2 will occur by the plant and thus the rate of formation of glucose or rate of phtosynthesis will be decreased.


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