Question
Which of the following statements regarding photorespiration are correct ?
(a) Do not occur in C3 plants
(b) CO$_2$ is consumed and O$_2$ is generated
(c) Phosphoglycolate is formed
(d) No synthesis of ATP and NADPH
Choose the correct answer from the options given below :
This question was previously asked in
NEET UG Re-Exam 2026 Question Paper (21-Jun-2026)
The correct answer is
(c) and (d) only
Understanding Photorespiration Statements
This section analyzes the provided statements about photorespiration to determine their correctness.
Evaluating Photorespiration Facts
- Statement (a): Incorrect. Photorespiration is a common process in C3 plants, particularly under conditions of high oxygen (O$_2$) and low carbon dioxide (CO$_2$) concentrations.
- Statement (b): Incorrect. Photorespiration consumes O$_2$ and releases CO$_2$. It is a wasteful process that does not fix carbon.
- Statement (c): Correct. Photorespiration begins when the enzyme RuBisCO adds O$_2$ to ribulose-1,5-bisphosphate (RuBP), leading to the formation of one molecule of 3-phosphoglycerate (3-PGA) and one molecule of 2-phosphoglycolate (phosphoglycolate).
- Statement (d): Correct. Unlike photosynthesis, photorespiration does not generate ATP or NADPH. Instead, it consumes these energy molecules and reducing power.
Correct Statements Identification
Based on the analysis, statements (c) and (d) accurately describe aspects of photorespiration.
Therefore, the correct option is (c) and (d) only.
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