In activity 6.1 class 10 ncert ,why they have removed or utilised starch and then created by photosynthesis again.Why did not they directly took leaf and did the experiment.

Asked by avinashdesaiad10 | 21st May, 2019, 02:15: PM

Expert Answer:

We test for the presence of starch in leaves in order to determine that photosynthesis has occurred. Glucose, the product of photosynthesis is rapidly converted into starch for storage in the chloroplast and cytoplasm.

In order to determine whether a factor is essential for photosynthesis to occur, we need to remove all traces of starch in leaves so that we can provide evidence that photosynthesis takes place during the experiment i.e. in the presence of this factor and not in its absence.

If starch is already present at the beginning of the experiment the results will not be accurate. Hence, it is important to start off with a plant without starch. This is accomplished by destarching the leaves of a plant.

Answered by Sheetal Kolte | 21st May, 2019, 02:44: PM