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  4. The C4 plants differ from C3 plants with reference to the

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Q. The $C_{4}$ plants differ from $C_{3}$ plants with reference to the

AIIMSAIIMS 2014

Solution:

Plants that utilise primarily RuBP to fix $CO _{2}$, which results in the formation of a $3$ carbon compound $(3 PGA)$ are called $C _{3}$ plants. Hatch and Slack proposed a new pathway in plants for $CO _{2}$ fixation via the carboxylation of PEP (phosphoenol pyruvate). Because the products are $4$ carbon compound, the plants are known as $C _{4}$ plants.