Explain how during light reaction of photosynthesis, ATP synthesis as a chemiosmotic phenomenon takes place?

3

(a)

Even though a very few cells in a C₄ plant carry out the biosynthetic – Calvin pathway, yet they are highly productive. Can you discuss why?

3

(a)

What can we conclude from the statement that the action and absorption spectra of photosynthesis overlap? At which wavelength, do they show peaks?

3

(a)

Photosynthetic organisms occur at different depths in the ocean. Do they receive the light?How do they adapt to carry out photosynthesis under these conditions?

3

(a)

What conditions enable RuBisCO to function as an Oxygenase? Explain the ensuring process.

3

(a)

Two groups (A and B) or bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to light of wavelength 400-450 nm Group B to the light of wavelength of 500-550 nm.Compare the photosynthesis rate of two groups by giving reason.

3

(a)

In what kind of plants do you come across Kranz anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants, which lack this anatomy?

3

(a)

By looking at which internal structure of a plant can you tell whether a plant is C₃ or C₄? Explain.

3

(a)

Give comparison between the following:
(a) C₃ and C₄ pathways
(b) Cyclic and non-cyclic photophosphorylation
(c) Anatomy of leaf in C₃ and C₄ plants

3

(a)

Give a brief explanation of photosynthesis.

3

(a)

Give a brief account of light reaction

3

(a)

What do you understand by splitting of water and its importance in photosynthesis

3

(a)

What is photorespiration?

3

(a)

In chloroplast what are sites for light reactions and dark reactions?

3

(a)

Describe chemiosmosis.

3

(a)