- A positive standard reduction potential implies the products are favored over the reactants under standard conditions.TrueFalse
- What is the terminal electron acceptor in aerobic organisms?UbiquinoneNAD+FADO2
- Which reactions in the TCA cycle use a thioester substrate (a substrate with acetyl-CoA attached)?Steps 2 and 3Steps 1 and 5Steps 1 and 3
- What does the reduction potential of 0.815 V for the reduction of oxygen to water indicate?water is a very strong reducing agentoxygen is a very strong oxidizing agentwater is a very strong reducing agent and oxygen is a very strong oxidizing agentwater will be spontaneously reduced to oxygen
- Which of the following is activated by ADP?aconitasemalate dehydrogenasesuccinyl-CoA synthetaseisocitrate dehydrogenase
- The reaction catalyzed by fumarase is _____.a dehydration of an alcohola hydration of an alkenea hydroxylation of an alkenean isomerization of an alcohol
- Which of the enzymes of the TCA cycle contain an FAD cofactor?succinate dehydrogenaseisocitrate dehydrogenasea-ketoglutarate dehydrogenasemalate dehydrogenase
- What cellular location contains pyruvate dehydrogenase and most of the citric acid cycle enzymes?mitochondrial matrixcytosolmitochondrial inter-membrane spaceinner mitochondrial membrane
- The regulated enzymes of the TCA cycle include:Malate dehydrogenaseFumarase⍺-ketoglutarate dehydrogenaseCitrate lyase
- Which of the following answers complete the sentence correctly?Succinate dehydrogenase...is a copper-sulfur protein.carries out an oxidative decarboxylation like isocitrate dehydrogenase.contains FAD and NAD+ cofactors like pyruvate dehydrogenase.is an integral membrane protein, unlike the other enzymes of the citric acid cycle.
- Which of the enzymes listed below require NAD+?Glyceraldehyde-3-phosphate dehydrogenaseMalate dehydrogenaseIsocitrate dehydrogenaseSuccinate dehydrogenase
- Which of the following condenses with oxaloacetate to form citrate?acetyl-CoAsuccinyl-phosphatecarboxybiotincis-aconitate
- The first reaction of gluconeogenesis is:a carboxylationa redox reactiona phosphate transferan oxidative decarboxylation
- Which of the following pyruvate dehydrogenase enzymes is correctly paired with the coenzyme that is associated with it?E3: FADE3: lipoamideE1: coenzyme AE2: thiamine pyrophosphate
- What makes the reaction catalyzed by citrate synthase highly exergonic?hydrolysis of ATPconversion from keto to enol tautomerdecarboxylation reactionhydrolysis of thioester
- Which of the following enzymes catalyzes the transfer of a phosphoryl group from ATP to glucose?aldolasephosphoglucose mutasehexokinaseglucose-6-phophatase
- A major allosteric regulator of both glycolysis and gluconeogenesis is:2,3-bisphosphoglycerate1,3-bisphosphoglycerateFructose-1,6-bisphosphateFructose-2,6-bisphosphate
- The steps in glycolysis that differ from those of gluconeogenesis are catalyzed by:Triose phosphate isomerase, phosphofructokinase, aldolasePyruvate kinase, phosphofructokinase, hexokinaseHexokinase, phosphofructokinase, aldolasePyruvate kinase, aldolase, enolase
- What are the potential control points in glycolysis? What is the actual control point (commitment step)?Possible: 1, 4, 9: Actual: 1Possible: 1, 3, 10; Actual: 1Possible: 1, 3, 10; Actual: 3Possible: 2, 3, 9; Actual: 2
- Glucose is converted to _____ in skeletal muscle under anaerobic conditions.LactateGlycogenAcetyl-CoAEthanol and CO2