Multiple choice

Photolysis happens in _____ reaction(s) of photosynthesis.

  1. the first

  2. the second

  3. the third

  4. All the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photolysis (the light-induced splitting of water molecules) occurs during the second phase of the light-dependent reactions in photosynthesis. During the first phase, chlorophyll absorbs light and gets excited. In the second phase, the excited electrons are replaced by splitting water (photolysis), releasing oxygen and providing electrons to continue the process.

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