A C4 plant does not undergo photorespiration because its enzyme site accumulates CO2 by itself, making photorespiration impossible. By breaking down C4 acid in the cells of the bundle sheath, the CO2 that is released gives rise to an increase in intracellular concentration. Ultimately, this ensures the RuBisCO is an efficient carboxylase, and that oxygenase activity is minimized. Photosynthesis rates thus increase, increasing the productivity of C4 plants.
Answered by Abhisek | 1 year agoGive a comparison between the following:
(a) C3 and C4 pathways
(b) Cyclic and non-cyclic photophosphorylation
(c) Anatomy of leaf in C3 and C4 plants
Figure shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions:
(a) At which point/s (A, B or C) in the curve is light a limiting factor?
(b) What could be the limiting factor/s in region A?
(c) What do C and D represent on the curve?
Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?
Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?
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?