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What is required for both the light-dependent and light-independent reactions to proceed?


Aenergy
BCO₂
Cwater

Verified Answer :

Final answer:

Both the light-dependent and light-independent reactions of photosynthesis need specific inputs to proceed. The light-dependent reactions require water and light energy, while the light-independent reactions utilize CO2 and energy carriers like ATP. Thus, water is essential for the light-dependent reactions, while CO2 is crucial for the light-independent reactions.


Explanation:

Requirements for Photosynthetic Reactions

In photosynthesis, both the light-dependent and light-independent reactions are critical for converting solar energy into chemical energy. Each set of reactions has specific requirements to occur:

  • Light-Dependent Reactions: These reactions take place in the thylakoid membranes of chloroplasts and require light energy to excite electrons. The main inputs are:
  1. Water: Water molecules (H2O) are split in a process called photolysis, providing electrons and releasing oxygen as a byproduct.
  2. Light Energy: Sunlight is absorbed by chlorophyll, the green pigment in plants, to activate the photosynthetic process.
  • Light-Independent Reactions: Also known as the Calvin Cycle, these occur in the stroma of chloroplasts and do not require light directly but depend on the products of the light-dependent reactions:
  1. Carbon Dioxide (CO2): This gas is fixed in the cycle to produce glucose and other carbohydrates.
  2. ATP and NADPH: These energy carriers produced from the light-dependent reactions provide the energy and reducing power needed for the Calvin Cycle.

In summary, while light-dependent reactions require water and light energy, the light-independent reactions mainly depend on CO2 and the energy carriers generated by the former.


Learn more about photosynthesis here:

https://brainly.com/question/29764662


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