Which is wrong for cytochrome P–450?

1.  It contains Fe
2.  It is concerned with oxidation
3.  It is a pigment
4.  It is a coloured cell

What change occurs during conversion of proto chlorophyll to chlorophyll :

1.  Addition of 2H in one pyrrole ring
2.  Loss of 2H
3.  Addition of Mg
4.  Loss of Mg

Which of the following absorbs light energy for photosynthesis:
1. Chlorophyll
2. Water molecule
3. O₂
4. RUBP

Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants:

Photosynthetically active radiation (PAR) represents the following range of wavelengths:
1. 450-950 nm
2. 340-450 nm
3. 400-700 nm
4. 500-600 nm