Question

When the sugarcane leaves are fed with radioactive 14CO2, in which molecule would radioactivity appear first in plants?

Answer 1

Answer:

Explanation:

3-Phosphoglycerate Oxalocacetate

3-Phosphoglycerate 3-Phosphoglycerate

Oxalocaetate Oxaloacetate

Malate 3-Phosphoglycerate

Answer :

A

Solution :

Wheat is a C3 plant and sugarcane is a C4 plant. In a C3 plant, first product of photosynthesis is3-phosphoglycerate whereas in a C4 plant, first product of photosynthesis is a 4-C organic acid i.e., oxaloacetic acid which is reduced to malic acid (malate) or transaminated to form aspartate. In second, more than 94% of fixed radioactivity if ound to be present in malate, aspartate and oxalocetate.