The citric acid cycle begins with oxaloacetate accepting an…
The citric acid cycle begins with oxaloacetate accepting an acetyl group to form citrate. The two CO2 molecules removed during one turn of the cycle do not originate from the acetate incorporated during that turn. What is the best explanation why aconitase, the enzyme that acts on citrate, does not act on the acetyl-derived portion of this molecule? aconitase.png
Read DetailsThe ATP-ADP translocase exchanges ATP-4 and ADP-3 across the…
The ATP-ADP translocase exchanges ATP-4 and ADP-3 across the inner mitochondrial membrane (IMM) as illustrated below. Select the statement that best describes the source of energy that makes this process spontaneous. ATP translocase.png
Read DetailsIsocitrate dehydrogenase couples the oxidative decarboxylati…
Isocitrate dehydrogenase couples the oxidative decarboxylation of isocitrate to the reduction of NAD+ according to the two half-reactions i s o c i t r a t e → α – k e t o g l u t a r a t e + C O 2 + 2 e – + H + N A D + + H + + 2 e – → N A D H Select the free energy diagram that best describes the energetics of the enzyme-catalyzed electron transfer from isocitrate (iso) to NADH. ICDHcoupledRxn.png
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