Question

Identify the reason for photorespiration not occurring in $C_{4}$ plant

• A. $O_{2}$ is not released in $C_{4}$ plant during photosynthesis
• B. intracellular concentration of $CO_{2}$ is high in bundle sheath
• C. the intracellular concentration of CO₂ is low in bundle sheath cells
• D. the intracellular concentration of CO₂ is high in bundle sheath and mesophyll cells

Answer 1

Answer: (B)

Photorespiration is followed when the enzyme Rubisco does not get enough carbon dioxide and is exposed to a higher concentration of oxygen. In C4 plants, bundle sheath cells maintain a high level of $CO_{2}$ to keep the Rubisco engaged in reducing $CO_{2}$ and making glucose.