Question

To determine that light is essential for photosynthesis, following are the steps, but not in
sequence :
(i) Pluck the leaf and do the starch test.
(ii) Keep the selected plant in sunlight.
(iii) Destarch the plant for 48 - 72 hours.
(iv) Cover the leaf with black paper strip.
The correct sequence is

• A. (iii), (i), (ii), (iv)
• B. (iii), (ii), (iv), (i)
• C. (iii), (iv), (ii), (i)
• D. (i), (ii), (iv), (iii)

Answer 1

The correct option is C (iii), (iv), (ii), (i)

The correct sequence determining that light is essential for photosynthesis is-

1. Destarch the plant for 48-72 hours.
2. Cover the leaf with black paper strip.
3. Keep the selected plant in sunlight.
4. Pluck the leaf and do the starch test.

Option "C" is correct.