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Photosynthesis In Higher Plants

Question
CBSEENBI11002770

A plant is provided with the ideal conditions for photosynthesis and supplied with isotope 14 CO2. When the products of the process are analysed carefully, what would be the nature of products?

  • Glucose and oxygen are labelled

  • Oxygen is labelled, but glucose is normal

  • Glucose and oxygen are normal 

  • Glucose is labelled, but oxygen is normal

Solution

D.

Glucose is labelled, but oxygen is normal

In the process of photosynthesis

6CO2 + 12H2O hv C6H12O6  + 6H2O + 6O2 

Plants manufacture glucose from H2O and CO2 and oxygen gas is released. So, due to the isotopic carbon of CO2, only glucose will be labelled, but oxygen will be normal.