Answer :
The molecule which is made by the light reactions in plants and that could be used by cellular respiration in some bacteria is oxygen. Cellular respiration takes place in both the dark and the light, while photosynthesis only takes place in the light. Complex organic compounds store energy during photosynthesis, while complex organic molecules also release energy during cellular respiration.
The majority of autotrophs, or creatures that do not rely on outside sources for sustenance, rely on light reactions to produce most of their energy. These creatures are referred to as photoautotrophs. Chemical processes known as "light reactions" happen when light is present. Photosynthesis is the name for the light-induced reaction that occurs in plants. This is how light energy is changed into chemical energy. In this procedure, sunlight-derived light energy is transformed into ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).
In the chloroplast of the mesophyll cells of the leaves, a light-dependent process takes place. The stacked disc-like structures known as thylakoids make up the double-membraned cell organelles known as chloroplasts. The membrane of these thylakoids contains the pigment chlorophyll, which is necessary for the process and is where the light reaction takes place.
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