Photoact
from class:
General Biology I
Definition
Photoact is the initial reaction that occurs when a photon of light is absorbed by a molecule, leading to an excited state. This process is crucial in converting light energy into chemical energy during photosynthesis.
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5 Must Know Facts For Your Next Test
- Photoact occurs in the chlorophyll molecules within the thylakoid membranes of chloroplasts.
- The absorption of light energy by chlorophyll leads to the excitation of electrons.
- Excited electrons are transferred to an electron acceptor, initiating the electron transport chain.
- Photoact is essential for the production of ATP and NADPH in the light-dependent reactions.
- Different pigments absorb different wavelengths of light, thus optimizing the photoact process.
Review Questions
- Where does photoact occur within a plant cell?
- What happens to electrons during the photoact process?
- Why is photoact important for ATP and NADPH production?
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