Question

1. there isnt a paragraph to explain why chlorophyll is a limiting factor for photosynthesis. how do you think chlorophyll acts as a limiting factor for photosynthesis?

Explanation:

Photosynthesis requires chlorophyll to absorb light energy (specifically in the light - dependent reactions). Chlorophyll molecules are located in the thylakoid membranes of chloroplasts and are responsible for capturing photons from sunlight. If the amount of chlorophyll is low, less light energy can be absorbed. This means that the light - dependent reactions, which produce ATP and NADPH (needed for the light - independent Calvin cycle to fix carbon dioxide into glucose), will be limited. For example, in plants with chlorosis (a condition where chlorophyll production is reduced, often due to nutrient deficiencies like lack of magnesium which is a central atom in chlorophyll), the rate of photosynthesis decreases because there are fewer chlorophyll molecules to harvest light. So, when the quantity of chlorophyll is insufficient, it restricts the overall rate of photosynthesis as the initial step of energy capture is hampered.

Answer:

Chlorophyll absorbs light energy for photosynthesis. Insufficient chlorophyll limits light absorption, reducing the production of ATP and NADPH (from light - dependent reactions) that fuel the Calvin cycle (light - independent reactions) for glucose synthesis, thus limiting the overall photosynthesis rate.