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Question

Assertion :Respiratory pathway is considered as an amphibolic pathway. Reason: It involves both anabolism and catabolism.


A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

During respiration, various substrates are broken down for deriving energy. Carbohydrates are broken down to glucose before entering respiratory pathways. Fats get converted into fatty acids and glycerol whereas fatty acids get converted into acetyl CoA before entering the respiration. Also, proteins are converted into amino acids, which enter respiration after deamination. Hence respiration is generally assumed to be a catabolic process. 
But acetyl CoA is withdrawn from the respiratory pathway during the synthesis of fatty acids. Also, in the synthesis of proteins, respiratory substrates get withdrawn. Thus, respiration involves both anabolism and catabolism and hence can be termed as an amphibolic pathway.

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Biology

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