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Assertion : Dark acidification of cytopl...

Assertion : Dark acidification of cytoplasm occurs in CAM plants.
Reason : Organic acids are decarboxylated during night.
(a) If both Assertion and Reason are true and the Reason is the correct explanation
(b) If both Assertion and Reason are true, but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true, but Reason is false.
(d) If both Assertion and Reason are false.

A

If both Assertion and Reason are true and the Reason is the correct explanation

B

If both Assertion and Reason are true, but the Reason is not the correct explanation of the Assertion.

C

If Assertion is true, but Reason is false.

D

If both Assertion and Reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "Dark acidification of cytoplasm occurs in CAM plants." - CAM (Crassulacean Acid Metabolism) plants are known for their unique adaptation to arid environments, where they open their stomata at night to take in carbon dioxide (CO2) and close them during the day to minimize water loss. 2. **Understanding the Reason**: - The reason given is that "Organic acids are decarboxylated during the night." - In CAM plants, during the night, CO2 is fixed into organic acids (like malic acid) which are stored. The decarboxylation of these acids occurs during the day, not at night. 3. **Evaluating the Assertion**: - The assertion is true because dark acidification does occur in CAM plants when they take up CO2 at night and convert it into organic acids. 4. **Evaluating the Reason**: - The reason is false because the decarboxylation of the organic acids happens during the day when the stomata are closed, and the CO2 is released for the Calvin cycle. 5. **Conclusion**: - Since the assertion is true and the reason is false, the correct option is (c) "If Assertion is true, but Reason is false." ### Final Answer: (c) If Assertion is true, but Reason is false. ---
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