Question

Explain how the first stage of photosynthesis captures and transfers energy.

a. Photosystem I captures sunlight and converts it into chemical energy.

b. Chlorophyll in the thylakoid membrane absorbs light energy, which is used to split water molecules and release oxygen.

c. ATP and NADPH are produced in the light-dependent reactions and carry energy to the Calvin cycle.

d. Carbon dioxide is fixed into organic molecules during the Calvin cycle.

Answer 1

Photosynthesis occurs in two stages: the light-dependent reactions and the Calvin cycle. In the light-dependent reactions, chlorophyll absorbs energy from sunlight and converts it into chemical energy. ATP and NADPH are produced and carry energy to the Calvin cycle.

Step-by-step explanation:

Photosynthesis takes place in two stages: the light-dependent reactions and the Calvin cycle. In the light-dependent reactions, chlorophyll absorbs energy from sunlight and converts it into chemical energy with the use of water. The light-dependent reactions release oxygen as a byproduct from the splitting of water. In the Calvin cycle, the chemical energy derived from the light-dependent reactions drives both the capture of carbon in carbon dioxide molecules and the subsequent assembly of sugar molecules. ATP and NADPH are produced in the light-dependent reactions and carry energy to the Calvin cycle.