TCA cycle and ETC Quiz

Electron Transport Chain (ETC)

• The main purpose of the ETC is to generate ATP during cellular respiration.
• The primary energy source for the ETC is the proton gradient generated by the transfer of electrons.

Conversion of Pyruvate to Acetyl-CoA

• The molecule produced during the conversion of pyruvate to Acetyl-CoA is CO2.

Beta Oxidation

• The role of beta oxidation in cellular respiration is to break down fatty acids into Acetyl-CoA.

Complexes of the Electron Transport Chain

• Complex I: also known as NADH dehydrogenase, it transfers electrons from NADH to CoQ and generates a proton gradient.
• Complex II: also known as succinate dehydrogenase, it transfers electrons from succinate to CoQ and does not generate a proton gradient.
• Complex III: also known as cytochrome b-c1 complex, it transfers electrons from CoQ to cytochrome c and generates a proton gradient.
• Complex IV: also known as cytochrome c oxidase, it transfers electrons from cytochrome c to oxygen and generates a proton gradient.

Proton Translocation

• The structural changes in Complex I direct H+ to move through translocation half-channels.

Supramolecular Assemblies

• Supramolecular assemblies or supercomplexes are formed by the complexes of the electron transport chain.

ATP Synthesis

• The power source for the ATP synthase to convert H+ gradient into ATP is the proton gradient generated by the ETC.

Test your knowledge of the electron transport chain, TCA cycle, and metabolic pathways in this BIOL2020 lecture 9 quiz. Explore the role of amino acids, sugars, and lipids in feeding into the TCA cycle and understand the processes of glycolysis, oxidation of glucose, and the production of ATP. Challenge yourself with questions about key components such as pyruvate dehydrogenase, acetyl-CoA, NADH, and FADH