Back to your test review

How many electrons must be removed from water to release one molecule of O2?

  • (a) 1 Your answer
  • (b) 2 Your answer
  • (c) 4 Correct
  • (d) 8 Your answer
Your answer: Correct answer: (c)
Advertisement

Explanation

Why (c) is correct

2H2O → 4H+ + O2 + 4e−: four electrons are removed from two water molecules to release one O2.

Why the other options are wrong

  • (a) · your answer One electron is too few.
  • (b) · your answer Two electrons come from one water molecule; one O2 needs two water molecules.
  • (d) · your answer Eight electrons would release two O2.
NCERT point: These electrons replace those lost by P680.
What is wrong?
Thank you! We will check this question.
Practise Photosynthesis in Higher Plants
Take a free 15-question NEET Biology test on this chapter. Timed, scored instantly.
Start free test

Similar questions

In the Z scheme, the electron carriers between PS II and PS I include For a long time the primary CO2 acceptor was believed to be a RuBisCO is so named because it