Energy from Fatty Acid Oxidation 3 of 29 > Constants| Periodic Table Learning Go
ID: 198265 • Letter: E
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Energy from Fatty Acid Oxidation 3 of 29 > Constants| Periodic Table Learning Goal To calculate the energy generated by the oxidation of a fatty acid Fatty acids yield more than twice as much energy per gram as carbohydrates. The image below shows the -oxidation pathway, a series of four reactions that oxidizes fatty acyl-SCoA to acetyl-SCoA. Note that the fatty acid is converted to fatty acyl-SCoA, an energy-requiring process, before it enters the B-oxidation pathway. The hydrocarbon tail of the fatty acid is represented by CH2 atoms and the R group in acyl-SCoA. Step 1. A double bond is introduced by enzyme- catalyzed removal of two hydrogens from carbons 2 and 3. The coenzymeF H H O R-CH2CH2 CH-CH-C-SCOA AD FAD is needed for this step. FADH Step 4. A carbon-carbon bond is broken to vield acetyl-SCoA and a chai H shortened fatty acid. R-CH,CH Further oxidation (repetition of Steps 1-4) R-CH2CH2-CCH,-C-SCCA Step 3. The alcoholgroup NADH/H is oxidized to a ketone. The Step 2. Water adds to the double bond to vield an alcohol. OH coenzyme NADt is used. NAD" R-CH2CH2 Energy is generated from the electrons of FADH2 and NADH that enter the electron transport chain and from the passage of acetyl-SCoA through the citric acid cycle Part A Calculate the number of molecules of acetyl-SCoA derived from a saturated fatty acid with 22 carbon atoms Express your answer as an integer View Available Hint(s) molecule(s) Submit PreviouS AnswerSExplanation / Answer
As the acetyl Co. A molecules has two carbons in its skeletion the number of possible acteyl co A molecules from 22 carbon atoms is
22/2 = 11.
The answer is 11.
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