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JIPMER 2017
Exam
JIPMER
Year
2017
Subject
Botany
Chapter
Photosynthesis in Higher Plants

JIPMER 2017 · Botany · Photosynthesis in Higher Plants

A plant is provided with ideal conditions for photosynthesis and...

A plant is provided with ideal conditions for photosynthesis and supplied with isotope 14 CO2\mathrm{CO}_2. When the products of the process are analysed carefully, what would be the nature of products?

Options

  1. AGlucose and oxygen are labelled
  2. BOxygen is labelled, but glucose is normal
  3. CGlucose and oxygen are normal
  4. DGlucose is labelled, but oxygen is normal

Correct answer

D. Glucose is labelled, but oxygen is normal

Step-by-step solution

In the process of photosynthesis 6CO2+12H2O→Chlhv6 \mathrm{CO}_2+12 \mathrm{H}_2 \mathrm{O} \xrightarrow[\mathrm{Chl}]{\mathrm{hv}}C6H12O6+6H2O+6O2↑ (Glucose) \begin{aligned} & \mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+6 \mathrm{H}_2 \mathrm{O}+6 \mathrm{O}_2 \uparrow \\ & \text{ (Glucose) }\end{aligned}$PlantsmanufactureglucosefromPlants manufacture glucose from\mathrm{H}_2 \mathrm{O} and \mathrm{CO}_2andoxygengasisreleased.So,duetoisotopiccarbonofand oxygen gas is released. So, due to isotopic carbon of\mathrm{CO}_2$, only glucose will be labelled, but oxygen will be normal.
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