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Unformatted text preview:  (a)False.BiotinisrequiredforacetylCoAcarboxylaseactivity. (b)True. (c)False.ATPisrequiredtosynthesizemalonylCoA. (d)True. (e)True. (f)False.Fattyacidsynthaseisadimer. (g)True. (h)False.AcetylCoAcarboxylaseisstimulatedbycitrate,whichisimportantforshuttlingacetyl ­ CoAfrommitochondriatothecytosol.  3. OnlyoneacetylCoAmoleculeisuseddirectlyinfattyacidsynthesis.Identifythecarbonatoms inpalmiticacidthatweredonatedbyacetylCoA.  TheonlyacetylCoAuseddirectly,notintheformofmalonylCoA,providesthetwocarbon atomsattheveryendofthefattyacidchain.BecausepalmiticacidisaC16fattyacid,acetylCoA willhaveprovidedcarbons15and16.  4. AlthoughHCO3 isrequiredforfattyacidsynthesis,itscarbonatomdoesnotappearinthe product.Explainhowthisomissionispossible.  HCO3 isattachedtoacetylCoAtoformmalonylCoA.WhenmalonylCoAcondenseswithacetyl CoAtoformthefour ­   5. Avidin,aglycoproteinfoundineggs,...
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