Back to your test review

A very large increase in light intensity beyond a point causes

  • (a) a steady rise in photosynthesis at all times Your answer
  • (b) conversion of C3 plants into C4 plants Your answer
  • (c) no effect at all on the rate of photosynthesis Your answer
  • (d) breakdown of chlorophyll and a fall in rate Correct
Your answer: Correct answer: (d)
Advertisement

Explanation

Why (d) is correct

A very large increase in light intensity can break down chlorophyll, and photosynthesis then decreases.

Why the other options are wrong

  • (a) · your answer The rate does not keep rising; it saturates and then may fall.
  • (b) · your answer Light intensity cannot change the type of plant.
  • (c) · your answer Very high light can harm chlorophyll, so it does affect the rate.
NCERT point: NCERT: increase in incident light beyond a point causes breakdown of chlorophyll.
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

CO2 is a major limiting factor for photosynthesis because Increasing CO2 concentration up to about 0.05% increases CO2 fixation. Beyond this, At low light intensity, the response of C3 and C4 plants to high CO2 is that