Question

During light reaction of photosynthesis how many photons are required for evolution of one O₂?
a) Six
b) Eight
c) Four
d) Two

Answer 1

answer is six yes or no

Answer 2

Dear friend,

● Answer - (b) Eight
During light reaction of photosynthesis *eight* photons are required for evolution of one O₂.

● Explanation -
For evolution of each oxygen molecule,
- PS-I absorbs 4 photons
- PS-II absorbs 4 photons
- Total photons required = 4 + 4 = 8 photons

These photons provide energy for transfer of energetic electron to an electron acceptor.

Hope this helped you. Thanks for asking..