Question:

Which one of the following is wrong in relation to photorespiration ?

Updated On: Aug 20, 2024

It occurs in chloroplast
It occurs in day time only
It is a characteristic of $C_{4}$ plants
It is a characteristic of $C_3$ plants

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The Correct Option is C

Solution and Explanation

Photorespiration is a type of respiration which occurs in green cells in presence of light. It involves three organelles - chloroplast, peroxisomes and mitochondria. Respiratory substrate in photorespiration is a 2-carbon compound glycolic acid (2C), hence called C2 cycle. RuBP-carboxylase in normal O2/CO2 conc, acts as 'carboxylase'. It is the key enzyme of photosynthesis in C3 plants.

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Concepts Used:

Photosynthesis in Higher Plants

Processes Of Photosynthesis in Higher Plants:

Photosynthesis in higher plants involves the following processes:

Light Reaction
Dark Reaction

Light Reaction:

This phenomenon occurs in the presence of light.
The pigment absorbs light and produces energy in the form of ATP.
The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.

Dark Reaction:

This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:

Calvin Cycle (C3 Cycle)
C4 Cycle (Hatch and Slack Pathway)