Action Spectrum

Q. The most effective wavelength of light participating in photosynthesis is

1. 450-520 nm
2. 700-760 nm
3. 660-700 nm
4. 520-560 nm

Q. Which of the following lights, is least effective during photosynthesis?

1. Red
2. Green
3. Blue
4. Infra-red

Q.

The active component of photosystem I is composed of

1. Chlorophyll h with absorption peak at 680 nm

2. Chlorophyll h with absorption peak at 680 nm

3. Chlorophyll a with absorption peak at 680 nm

4. Chlorophyll a with absorption peak at 700 nm

Q. In the higher plants, which region of visible light shows maximum absorption by carotenoids?

1. Violet and blue
2. Green and red
3. Red and violet
4. Blue and green