Light Absorbing Pigments

Q. Which property of the phytol tail of chlorophyll molecule allows it to anchor it to the thylakoid membranes?

1. Being hydrophilic in nature
2. Being hydrophobic in nature
3. Having Mg as the metal ion
4. None of the above

Q. Chlorophyll is the only light absorbing pigment in the leaves.

1. False
2. True

Q. What could be the limiting factor/s in region A?

Q. The wavelength of light absorbed by Pr form of phytochrome is:

1. 620 nm
2. 640 nm
3. 680 nm
4. 720 nm

Q. The porphyrin head of chlorophyll has ___________ atom at its centre.

1. sodium atom
2. magnesium atom
3. calcium atom
4. potassium atom

Q. Which of the following pigments is yellow in colour?

1. Chlorophyll 'a’
2. Chlorophyll ‘b’
3. Carotene
4. Xanthophylls

Q. In the process of photosynthesis, light energy is absorbed by

1. chlorophyll
2. oxygen molecule
3. $C{O}_2$
4. RuBP

Q.

Suppose there were plants that had a high concentration of Chlorophyll-b, but lacked chlorophyll-a, would it carry out photosynthesis? Then why do plants have chlorophyll-b and other accessory pigments?

Q.

Which of the following elements is needed for chlorophyll biosynthesis?

1. Copper

2. Magnesium

3. Calcium

4. Chlorine

Q.

The absorption and action spectrum of photosynthesis show two maximums, one in the blue region and another in the red. What are the reasons for these?

1. The two pigment systems.

2. The absorbance property of chlorophyll molecules

3. The other colours cannot be absorbed

4. None of these