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NEETBotanyPhotosynthesis in Higher Plants

Choose the incorrect statement regarding the diagram given below.

Options

  1. AThe primary CO 2 acceptor is a 3-carbon molecule phosphoenol pyruvate (PEP) and is present in the mesophyll ce
  2. BThe C4 acid OAA is formed in the mesophyll cells which then forms other 4-carbon compounds like malic acid or
  3. CIn the bundle sheath cells these C 4 acids are broken down to release CO 2 and a 3-carbon molecule and it is i
  4. DThe 3-carbon molecule is transported back to the mesophyll where it is converted to PEP again, thus, completin

Correct answer

C. In the bundle sheath cells these C 4 acids are broken down to release CO 2 and a 3-carbon molecule and it is i

Step-by-step solution

The primary CO 2 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 C 4 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 are transported to the bundle sheath cells. In the bundle sheath cells these C 4 acids are broken d

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