Class 11 Biology NCERT Solutions For Chapter 13 Photosynthesis in Higher Plants

Download NCERT Solutions for Class 11 Biology

Chapter 13 Photosynthesis in Higher Plants

(Link of Pdf File is given below at the end of the Questions list)

In this pdf file you can see answers of following Questions

Question 1:
By looking at a plant externally can you tell whether a plant is C3 or C4 ? Why and how?

Question 2:
By looking at which internal structure of a plant can you tell whether a plant is C or C3 ? Explain.

Question 3:
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?
Question 4:
RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C4 plants?

Question 5:
Suppose there were plants that had a high concentration of Chlorophyll-b, but lackedchlorophyll-a, would it carry out photosynthesis? Then why do plants havechlorophyll-b and other accessory pigments?
Question 6:
Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?
Question 7:
Look at leaves of the same plant on the shady side and compare it with the leaves onthe sunny side. Or, compare the potted plants kept in the sunlight with those in theshade. Which of them has leaves that are darker green? Why?
Question 8:
Figure 13.10 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?

Question 9:
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

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