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Which one of the following is wrong in relation to photorespiration?
- a)It occurs in daytime only.
- b)It occurs in chloroplast.
- c)It is characteristic of C3 plants.
- d)It is characteristic of C4 plants.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which one of the following is wrong in relation to photorespiration?&#...
Explanation:
Photorespiration is a process that occurs in plants, particularly those that use the C3 photosynthetic pathway. It is a wasteful process that occurs when the enzyme Rubisco, which is responsible for fixing carbon dioxide during photosynthesis, also binds to oxygen. This results in the production of a toxic compound that needs to be detoxified, which requires energy and resources.
Option A: It occurs in daytime only.
This statement is incorrect. Photorespiration can occur both during the day and night, although it is more common during the day when there is more light available for photosynthesis.
Option B: It occurs in chloroplast.
This statement is correct. Photorespiration occurs in the chloroplast, the organelle responsible for photosynthesis.
Option C: It is characteristic of C3 plants.
This statement is correct. Photorespiration is a characteristic of C3 plants, which include many common crops such as wheat, rice, and soybeans.
Option D: It is characteristic of C4 plants.
This statement is incorrect. C4 plants have evolved a mechanism to concentrate carbon dioxide around Rubisco, which reduces the likelihood of photorespiration occurring. Therefore, photorespiration is not characteristic of C4 plants. Examples of C4 plants include maize, sugarcane, and sorghum.
Therefore, the correct answer is option D, "It is characteristic of C4 plants."
Photorespiration is a process that occurs in plants, particularly those that use the C3 photosynthetic pathway. It is a wasteful process that occurs when the enzyme Rubisco, which is responsible for fixing carbon dioxide during photosynthesis, also binds to oxygen. This results in the production of a toxic compound that needs to be detoxified, which requires energy and resources.
Option A: It occurs in daytime only.
This statement is incorrect. Photorespiration can occur both during the day and night, although it is more common during the day when there is more light available for photosynthesis.
Option B: It occurs in chloroplast.
This statement is correct. Photorespiration occurs in the chloroplast, the organelle responsible for photosynthesis.
Option C: It is characteristic of C3 plants.
This statement is correct. Photorespiration is a characteristic of C3 plants, which include many common crops such as wheat, rice, and soybeans.
Option D: It is characteristic of C4 plants.
This statement is incorrect. C4 plants have evolved a mechanism to concentrate carbon dioxide around Rubisco, which reduces the likelihood of photorespiration occurring. Therefore, photorespiration is not characteristic of C4 plants. Examples of C4 plants include maize, sugarcane, and sorghum.
Therefore, the correct answer is option D, "It is characteristic of C4 plants."
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Which one of the following is wrong in relation to photorespiration?&#...
C4
plants capture carbon dioxide in their mesophyll cells (using an enzyme called phosphoenolpyruvate carboxylase
which catalyzes the combination of carbon dioxide with a compound called phosphoenolpyruvate (PEP)), forming oxaloacetate. This oxaloacetate is then converted to malate and is transported into the bundle sheath cells (site of carbon dioxide fixation by RuBisCO) where oxygen
concentration is low to avoid photorespiration.
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Which one of the following is wrong in relation to photorespiration?a)It occurs in daytime only.b)It occurs in chloroplast.c)It is characteristic of C3plants.d)It is characteristic of C4plants.Correct answer is option 'D'. Can you explain this answer?
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