Question

A photosynthetic algal filament is illuminated with white light that has passed through a prism such that the left and the right ends of the filament receive violet and red lights, respectively. The amount of oxygen released by this filament will be

• A. high at the left end and progressively reducing towards the right
• B. high at the right end and progressively reducing towards the left
• C. high at both ends and progressively reducing towards the middle
• D. high in the middle and progressively reducing towards both ends

Hint:

Light intensity and wavelength affect the rate of photosynthesis. Violet light produces the highest rate, while red light is less effective.

Answer 1

The Correct Option is A

Step 1: Understanding light absorption.
Photosynthetic organisms absorb light for photosynthesis, with violet light (high energy) being more effective in driving photosynthesis than red light (low energy).
Step 2: Oxygen production.
At the left end (violet light), photosynthesis will occur at a higher rate, releasing more oxygen. As we move to the right (red light), photosynthesis becomes less efficient, and oxygen production will decrease.
Step 3: Conclusion.
Therefore, the oxygen release will be highest at the left end (violet light) and decrease progressively towards the right (red light), so the correct answer is (A).