KCET · BIOLOGY · STD 11 - 11. Photosynthesis in Higher Plants
Statement A: Photorespiration decreases photosynthetic output.
Statement B: In photorespiratory pathway, neither ATP nor NADPH is produced.
- A Statement A is correct and statement B is wrong.
- B Both the statements A and B are correct.
- C Statement B is correct and statement A is wrong.
- D Both statements A and B are wrong.
Answer & Solution
Correct Answer
(B) Both the statements A and B are correct.
Step-by-step Solution
Detailed explanation
(B) Both the statements A and B are correct.,
Photorespiration is a wasteful process in \(C _3\) plants.
In \(C _3\) plants some \(O _2\) does bind to RuBisCO, and hence \(CO _2\) fixation is decreased. Here the RuBP instead of being converted to 2 molecules of PGA binds with \(O _2\) to form one molecule of phosphoglycerate and phosphoglycolate (2 Carbon) in a pathway called photorespiration.
In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of \(CO _2\) with the utilisation of ATP.
Photorespiration is a wasteful process in \(C _3\) plants.
In \(C _3\) plants some \(O _2\) does bind to RuBisCO, and hence \(CO _2\) fixation is decreased. Here the RuBP instead of being converted to 2 molecules of PGA binds with \(O _2\) to form one molecule of phosphoglycerate and phosphoglycolate (2 Carbon) in a pathway called photorespiration.
In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of \(CO _2\) with the utilisation of ATP.
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