NCERT solutions Biology Textbook for Class 11 chapter 13 Photosynthesis in Higher Plants



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Chapter 13 - Photosynthesis in Higher Plants

Pages 224 - 225

By looking at a plant externally can you tell whether a plant is C3 or C4? Why and how?

Q 1 | Page 224 | view solution

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

Q 2 | Page 224 | view solution

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?

Q 3 | Page 224 | view solution

RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C4 plants?

Q 4 | Page 225 | view solution

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-and other accessory pigments?

Q 5 | Page 225 | view solution

Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?

Q 6 | Page 225 | view solution

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?

Q 7 | Page 225 | view solution

In the 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?


Q 8 | Page 225 | view solution

Give comparison between the following: - C3 and C4 pathways

Q 9.1 | Page 225 | view solution

Give comparison between the following - Anatomy of leaf in C3 and C4 plants

Q 9.3 | Page 225 | view solution

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