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Chapters1 - The Living World
2 - Biological Classification
3 - Plant Kingdom
4 - Animal Kingdom
5 - Morphology of Flowering Plants
6 - Anatomy of Flowering Plants
7 - Structural Organisation in Animals
8 - Cell: The Unit of Life
9 - Biomolecules
10 - Cell Cycle and Cell Division
11 - Transport in Plants
12 - Mineral Nutrition
13 - Photosynthesis in Higher Plants
14 - Respiration in Plants
15 - Plant Growth and Development
16 - Digestion and Absorption
17 - Breathing and Exchange of Gases
18 - Body Fluids and Circulation
19 - Excretory Products and their Elimination
20 - Locomotion and Movement
21 - Neural Control and Coordination
22 - Chemical Coordination and Integration
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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?
By looking at which internal structure of a plant can you tell whether a plant is C3 or C4? Explain.
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?
RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C4 plants?
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?
Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?
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?
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?
Give comparison between the following: - C3 and C4 pathways
Give comparison between the following - Anatomy of leaf in C3 and C4 plants
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