Biology / Unit 3 Bio 0571 short lesson, about 20 seconds
Lipid Catabolism Connects to Respiration
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The idea
A fatty acid is catabolized through beta-oxidation into two-carbon acetyl groups that enter the citric acid cycle directly as acetyl CoA.
In practice
A hibernating bear's body runs largely on beta-oxidation, feeding its fat reserves' fatty acid chains into the citric acid cycle for months.
Where people slip
A fatty acid's carbon backbone enters at the citric acid cycle, not earlier in glycolysis.
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