Biochemistry Questions
Explore questions in the Biochemistry category that you can ask Spark.E!
What hormone that is produced in adipose tissue signals satiety (feeling full)?adiponectinamylinghrelinleptin
Complex III accepts electrons from _____ and transfers them to _____.ubiquinone; cytochrome ccytochrome c; cytochrome aubiquinol; cytochrome cubiquinol; cytochrome b
How many electrons can be carried by the prosthetic group in cytochrome c?1423
Which reaction in the TCA cycle gives electrons to ubiquinone?Step 2Step 4Step 6
During the oxidation of acetyl-CoA through the TCA cycle, which steps involve oxidative decarboxylations?Step 3Step 4Both
Which of the following terms describes the TCA cycle as both catabolic and anabolic?AmphipathicAnaplerotic
What is the ∆Gº' for the reduction of pyruvate to lactate by NADH given the following half reactions?pyruvate + 2H+ + 2e- -> lactate ∆Eº' = -0.185NAD+ + H+ + 2e- -> NADH ∆Eº' = -0.315-96.5 kJ/mol-12.5 kJ/mol-25.1 kJ/mol25.1 kJ/mol96.5 kJ/mol
Which reactions in the TCA cycle release CO2?Steps 1 and 2Steps 3 and 4Steps 5 and 6
Identify if the following statement is true or false:NADH accepts electrons during respiratory electron transport.TrueFalse
Flux through the TCA cycle is regulated at the _____ steps.irreversiblenear-equilibrium
Which component of ATP synthase functions as a transmembrane proton channel?F0F1
If the reduction potential for NAD+ is -0.315 V and the reduction potential for oxygen is 0.815 V, what is the potential for the oxidation of NADH by oxygen?-1.13 V0.50 V1.13 V0.185 V
Which of the following is the location of the Q cycle?Complex IIImitochondrial dehydrogenasesuccinate dehydrogenaseComplex Ifatty acyl-CoA dehydrogenase
Select the answers below as they pertain to the indicated pathway.Note: for the NET ATP yield include any and all ATP equivalents generated in a particular pathway(i.e. ATP, GTP). This should include the oxidation of reducing equivalents that may be generated in the pathway.Assume that NADH=2.5 ATP and FADH2=1.5 ATPAssume the carbon reactants are each going through the pathway once.PathwayNet Carbon Reaction: 20 glucose --> ? pyruvateNet ATP: ? ATPComplete net reaction: glucose + 2 NAD+ + 2ADP + 2 Pi ---> 2 pyruvate + 2 NADH + 2 ATP
Complex IV uses _____ and _____ ions to reduce oxygen to water.zinc; coppercopper; ironmanganese; ironmanganese; copper
How many NADH are produced when one acetyl group is oxidized in the TCA cycle?421>43
In the malate-aspartate shuttle, _____ is reduced to _____ in the cytosol.aspartate; oxaloacetateoxaloacetate; malateaspartate; malatemalate; aspartate
A man presents in the emergency room after ingesting an insecticide. The Poison Control Center indicates that the insecticide contains cyanide (CN-), which binds to and completely inhibits cytochrome c oxidase. Would ATP synthesis in this man's mitochondria be stopped?NoYes
When 2 electrons are passed through Complex I, ____ protons are transferred to the intermembrane space.6432
Complex IV of the electron transport chain oxidizes [ Select ] ["Cytochrome c", "Ubiquinol", "NADH"] , reduces [ Select ] ["NAD+", "FAD", "O2"] , and [ Select ] ["pumps", "doesn't pump"] protons in the process.