Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETBotanyPhotosynthesis in Higher Plants

Which compound is formed in the mesophyll cells of C4 plants after CO2 fixation?

Options

  1. AMalic acid
  2. BAspartic acid
  3. COxaloacetic acid (OAA)
  4. DPyruvic acid

Correct answer

C. Oxaloacetic acid (OAA)

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

Practice Photosynthesis in Higher Plants on Quantrex Academy →

More from Photosynthesis in Higher Plants

How many turns of Calvin cycle are required for the formation of three molecules of glucose ? 2026Photorespiration reaction catalyzed by RuBisCo is shown below : RuBP +O₂ 3-Phosphoglycerate + X Identify “X” from the given options : 2026Which of the following statements regarding photorespiration are correct ? (a) Do not occur in C3 plants (b) CO₂ is consumed and O₂ is generated (c) Phosphoglycolate is formed (d) 2026Which pigment has absorption peak at 700 nm in the photosynthetic reaction centre PS I (P700) ? 2026How many ATP and NADPH molecules are required to make one molecule of glucose through the Calvin pathway ? 2026Find the incorrect statement(s) about photosynthesis from the following : A. The water splitting complex is associated with PS I. B. C ₄ plants use the C ₃ pathway of CO ₂ fixation 2026The enzyme required for carboxylation in the Calvin cycle is : 2026Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants. 2026 Full Photosynthesis in Higher Plants list All NEET PYQs