Question

Q. 27. Mention the site of occurrence of the following events in sugar cane leaf.(a) Regeneration of RuBP(b) RuBP+CO, → 3PGA(C) PEPA+CO, → OAA(d) 4C acid formation​

Answer 1

The occurrence takes place in choloroplats, mesophyll cells and bundle sheath cells respectively.

Explanation:

• The occurrence of following reactions take place at the sites given below:

• Regeneration of RUBP takes place in the Stroma of chloroplast + cytoplasm.

• RUBP + CO2 -> 3PGA: Stroma of chloroplasts

• PEPA + CO2 -> OAA: Mesophyll cell

• 4C acid formation at Mesophyll cells

• 3C acid formation: bundle-sheath cells

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What is the function of the mesophyll cells?

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Answer 2

They occur in the following locations:

Explanation:

• (a) Regeneration of RuBP occurs in the Bundle sheath cells of C4 plant's leaves and stems surrounding the vascular bundles.
• (b) 3PGA, 3-phosphoglyceraldehyde is produced in the Bundle sheath cells of C4 plant's leaves and stems surrounding the vascular bundles.
• (c) OAA, oxaloacetic acid  is produced in the mesophyll cells of C4 plant's leaves and stems.
• (d) 4C acid is produced in the mesophyll cells of C4 plant's leaves and stems.
• Sugarcane is C4 plant.