Explain how an increase in light intensity can affect the rate of photosynthesis (3)
An increase in light intensity can affect the rate of photosynthesis by providing more energy for the photosynthetic process. This means that more photons are available for the light-dependent reactions to convert into chemical energy. As a result, the rate of light-dependent reactions, such as the production of ATP and NADPH, will increase, leading to a faster rate of photosynthesis overall.
Additionally, an increase in light intensity can also lead to an increase in the rate of the Calvin cycle, which is the light-independent reactions where carbon dioxide is converted into glucose. This is because the increased availability of ATP and NADPH from the light-dependent reactions can fuel the carbon fixation and reduction steps of the Calvin cycle more efficiently, resulting in a higher rate of glucose production.
Overall, by providing more energy for the photosynthetic process, an increase in light intensity can enhance the rate of photosynthesis and ultimately lead to greater plant growth and productivity.