Question

which reaction occurs only in light​

Answer 1

The Light Reactions. Photosynthesis begins with the light reactions. It is during these reactions that the energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membranes of the chloroplast.

Answer 2

$\huge\mathfrak\purple{Heya\:Mate}$❤

Photosynthesis occurs only in light.

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