Biology · Bioenergetics
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Where does the light dependent reaction takes place, in the plant cell?
- A
Stroma
- B
Cytosol
- C
Mitochondria
- D
Thylakoid/Grana
The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.
The stroma is the fluid-filled space within the chloroplasts, which is not the location of the light-dependent reactions. The light-dependent reactions take place in the thylakoid membrane, which is enclosed by the stroma.
The cytosol is the liquid component of the cytoplasm, found in the general cell interior. It is not the site of the light-dependent reactions. These reactions occur within specific membrane structures in the chloroplast.
Mitochondria are the organelles responsible for cellular respiration, not photosynthesis. Cellular respiration occurs in the mitochondria, and it is a process that converts nutrients into energy (ATP) for the cell to use. Light-dependent reactions, on the other hand, are part of the photosynthesis process and occur in the chloroplasts.
The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.
Tagged under Biology · Bioenergetics · 2021