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Question

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

A
Glucose and oxygen are labelled.
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B
Oxygen is labelled, but glucose is normal.
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C
Glucose and oxygen are normal.
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D
Glucose is labelled, but oxygen is normal.
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Solution

The correct option is C Glucose is labelled, but oxygen is normal.
In the process of photosynthesis, plants manufacture glucose from H2O and CO2 and oxygen gas is released.
6CO2+12H2OhvChlC6H12O6(Glucose)+6H2O+6O2
So, due to isotopic carbon of CO2, only glucose will be labelled, but oxygen will be normal.

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