Question:

Statement A : Photorespiration decreases photosynthetic output Statement B : In photorespiratory pathway, neither ATP nor NADPH is produced.

Updated On: Feb 23, 2024

Both the statements A and B are correct.
Both the statements A and B are wrong.
Statement A is correct and statement B is wrong.
Statement B is correct and statement A is wrong.

Hide Solution

Verified By Collegedunia

The Correct Option is A

Solution and Explanation

Photorespiration is a cyclic process in which RuBisCO acts as an oxygenase enzyme instead of carboxylase enzyme. Active site of this enzyme is same for both of these activities. In $C_{3}$ plants, some $O_{2}$ always bind to RuBisCO

Photorespiration does not produce energy or reducing power. Rather, it consumes energy. Further, it undoes the work of photosynthesis. There is $25\%$ loss of fixed $CO_{2}$

Was this answer helpful?

Questions Asked in KCET exam

View More Questions

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)