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NEETBotanyPhotosynthesis in Higher Plants

What do mesophyll cells in C4 plants lack?

Options

  1. AChloroplasts
  2. BMitochondria
  3. CRuBisCO enzyme
  4. DPEPcase enzyme

Correct answer

C. RuBisCO enzyme

Step-by-step solution

The pathway in C4 plants that has been named the Hatch and Slack Pathway, is again a cyclic process. The primary CO2 acceptor is a 3-carbon molecule phosphoenol pyruvate (PEP) and is present in the mesophyll cells. The enzyme responsible for this fixation is PEP carboxylase or PEPcase. It is important to register that the mesophyll cells lack RuBisCO enzyme . The C4 acid OAA is formed in the mesophyll cells. It then forms other 4-carbon compounds like malic acid or aspartic acid in the mesophyll cells itself, which

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