Question

why do fatty acids destined for degradation in the mitochondrial matrix need to first be activated...

why do fatty acids destined for degradation in the mitochondrial matrix need to first be activated by linkage to CoA that is; what purpose does it serve ?

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Answer #1

Peripheral tissues gain access to the lipid energy reserves stored in adipose tissue through three stages of processing. First, the lipids must be mobilized. In this process, triacylglycerols are degraded to fatty acids and glycerol, which are released from the adipose tissue and transported to the energy-requiring tissues. Second, at these tissues, the fatty acids must be activated and transported into mitochondria for degradation. Third, the fatty acids are broken down in a step-by-step fashion into acetyl CoA, which is then processed in the citric acid cycle.

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