Respiration and Energy Transfer — Biology STD 11 Science — Question
Maharashtra BoardEnglish MediumSTD 11 ScienceBiologyRespiration and Energy Transfer4 Marks
Question
Explain why the respiratory pathway is an amphibolic pathway?
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Answer
$1.$ Respiration is considered as a catabolic process; however, it is not entirely correct in case of Krebs cycle.
$2.$ Many reactions of Krebs cycle involve oxidation of acetyl $CoA$ to release energy and $CO_2.$
$3.$ However, the breakdown of respiratory substrates provides intermediates like a$-$ketoglutarate, oxaloacetate are used as precursors for synthesis of fatty acids, glutamic acid and aspartic acid respectively.
$4.$ Thus, as the same respiratory process acts as catabolic as well as anabolic pathway for synthesis of various intermediate metabolic products, it is called amphibolic pathway.
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