Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
A reduction in the quantity of oxygen evolution during photosynthesis may be observed at
BiologyPhotosynthesis in Higher PlantsNEET
Options:
  • A Light having wavelength more than 680 nm
  • B Light having wavelength less than 680 nm
  • C Light having wavelength 560 nm
  • D Light having wavelength less than 360 nm
Solution:
2893 Upvotes Verified Answer
The correct answer is: Light having wavelength more than 680 nm
In far-red light (wavelength more than 680 nm), there is a reduction in the quantity of O2 evolution.

The evolution of oxygen as a result of light-driven water
oxidation in photosystem II (PSII) is catalyzed by an Mn2+ cluster that acts both as a device for accumulating oxidizing equivalents and as the active site.

Infrared ray disturbs this complex and hence reduction on O2 evolution.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.