Ncert Exercises & Solutions

Observe the diagram and answer the following.

1. Which group of plants exibit these two types of cells?

2. What is the first product of C₄ cycle?

3. Which enzyme is there in bundle sheath cells and mesophyll cells?

(a) Monocot plants belonging to Graminae/Poaceae family, e.g., sugarcane, maize etc., possess these two types ofcells. i.e., bundle sheath and mesophyll cell (in kranz anatomy).

(b) A 4-carbon compoundoxaloacetic acid is the first product of C₄ cycle.

(c) Mesophyll cells have PEP carboxylase to fix atmospheric CO₂ to form a 4-carbon compound oxalo acetic acid, whereas bundle sheath cells have RUBP carboxylase which fix CO₂ by this enzyme to form 3-carbon compound 3 PGA (3 phosphoglyceric acid).

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