Identify the correctly matched rows:

		C3	C4
I.	Productivity	Low	High
II.	CO2 compensation point	Low	Low
III.	Temperature optimum	20 – 250 C	30 – 450 C

1. Only I and II	2. Only I and III
3. Only II and III	4. I, II and III

Except for plants in shade or in dense forests, light is rarely a limiting factor in nature. This is because:

The correct sequence of flow of electrons in the light reaction is

The reactions of the Calvin cycle can take place as long as which of the following products of the light dependent reactions are available?

The factors that can be limiting for the light independent reactions of photosynthesis are:
1. ${\mathrm{CO}}_2$, temperature, and light
2. ${\mathrm{CO}}_2$, light, and water
3. water, temperature, and ${\mathrm{CO}}_2$
4. oxygen, water, and temperature

The absorption spectrum in the given diagram will be of:
  

The wavelengths of light most useful in photosynthesis are:

Oxygen, during oxygenic photosynthesis, is produced during:
1. cyclic photophosphorylation
2. the light-dependent reactions involving photosystems I and II
3. Calvin cycle
4. the Krebs cycle

In oxygenic photosynthesis, the release of oxygen is a byproduct of:
1. chemiosmosis
2. reducing ${\mathrm{NADP}}^{+}$ by FNR
3. splitting the water molecules
4. cyclic photophosphorylation

The greatest problem with photorespiration is faced by: