Biological Oxidation and Energy Production

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What is the primary source of energy for living cells?

Electron transport chain
Oxidation of proteins
Redox chain
Oxidation of carbohydrates and lipids (correct)

What is the purpose of the redox chain in living cells?

To oxidize hydrogen
To reduce oxygen to water
To liberate energy in small, usable amounts (correct)
To generate massive amounts of energy

What has the highest electron affinity?

Hydrogen
Oxygen (correct)
Lipids
Carbohydrates

What is the final common pathway for electron transfer in aerobic cells?

Respiratory chain (Electron transport chain) (A) Signup and view all the answers

What is the byproduct of the reaction between hydrogen and oxygen?

Water and energy (A) Signup and view all the answers

What is the purpose of the electron transport chain?

To generate ATP (A) Signup and view all the answers

What is the role of NADH+ and FADH2 in cellular respiration?

To give hydrogen and electrons to the electron transport chain (C) Signup and view all the answers

Why is it necessary to transfer hydrogen in steps through the redox chain?

To prevent damage to living cells (A) Signup and view all the answers

What happens to the protons pumped through Complexes I, III, and IV?

They accumulate in the inter-membrane space, creating a pH gradient (B) Signup and view all the answers

What is the role of Complex V in the electron transport chain?

To generate ATP from ADP and Pi (A) Signup and view all the answers

What is the net result of oxidative phosphorylation from NADH?

3 ATP are generated (D) Signup and view all the answers

What is the effect of inhibitors of the electron transport chain?

They prevent the passage of electrons (D) Signup and view all the answers

What is the site of action for antimycin A?

Complex III (B) Signup and view all the answers

What is the function of F0-F1 channel in ATP synthase?

To allow protons to enter the ATP synthase (D) Signup and view all the answers

What is the effect of uncouplers on oxidative phosphorylation?

They allow oxidation but prevent phosphorylation (A) Signup and view all the answers

What is the net result of oxidative phosphorylation from FADH2?

2 ATP are generated (B) Signup and view all the answers

What is the final acceptor of electrons and protons in the respiratory chain?

Oxygen (A) Signup and view all the answers

Which enzyme complex is also known as ATP synthase?

Complex V (D) Signup and view all the answers

Which coenzyme is associated with Complex II?

FAD (B) Signup and view all the answers

What is formed when electrons combine with oxygen and protons?

Water (D) Signup and view all the answers

Which enzyme is found in Complex I?

NADH dehydrogenase (A) Signup and view all the answers

Which complex contains cytochrome a + a3?

Complex IV (C) Signup and view all the answers

What is the role of cytochrome C oxidase in the electron transport chain?

Transfer electrons to oxygen (A) Signup and view all the answers

What is the result of coupling oxidation and phosphorylation in the electron transport chain?

ATP synthesis (A) Signup and view all the answers