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One cannot distinguish between the C 3 or C 4 by looking at the plants externally. Whether a plant is a C 3 plant or C4 plant, the leaves of both are similar in appearance.

Photosynthesis in Higher Plants

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

One cannot distinguish between the C₃ or C₄by looking at the plants externally.Whether a plant is a C₃ plant or C4 plant, the leaves of both are similar in appearance.

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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?

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

Give comparison between the following :

(b) Cyclic and non-cyclic photophosphorylation

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Photosynthesis in Higher Plants

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

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