Question

Photorespiration is also known as
i. $C_2$ cycle
ii. PCR cycle
iii. HSK pathway
iv. PCO cycle

• A. i and ii
• B. i and iv
• C. iii and iv
• D. ii and iii

Answer 1

The correct option is B i and iv

Photorespiration (also known as the photosynthetic carbon oxidation cycle (PCO), or C₂ photosynthesis) refers to a process in plant metabolism where the enzyme RuBisCO oxygenates RuBP, wasting some of the energy produced by photosynthesis.

PCR cycle – Photosynthetic Carbon Reduction cycle – Calvin cycle.

HSK pathway – Hatch Slack Kortschak pathway – C4 pathway.