Compartmentalisation

Question 1

How many molecules of NADH + H+ are generated in one cycle of the TCA cycle?

Answer 1

3

Question 2

How many molecules of CO2 are released during one cycle of the TCA cycle?

Answer 2

2

Question 3

What carries out the conversion of ADP to ATP?

Answer 3

ATP synthase

Question 4

What is the primary role of the electron transport chain in mitochondria?

Answer 4

Generates a proton gradient across the inner mitochondrial membrane.

Question 5

How does the electron transport chain contribute to cellular respiration?

Answer 5

Reduces oxygen to water (key step in the production of ATP)

Question 6

What does the electron transport chain do with reducing equivalents?

Answer 6

Transfers reducing equivalents (e.g., electrons from NADH and FADH2) between complexes in the chain.

Question 7

Which component of the electron transport chain carries only one electron at a time?

Answer 7

Cytochrome c

Question 8

True or False: Cytochrome c oxidase carries one electron at a time.

Answer 8

False. Cytochrome c oxidase carries four electrons (it reduces oxygen to water), not just one.

Question 9

What is the role of ubiquinone (CoQ) in the electron transport chain?

Answer 9

Carries two electrons at a time and transports electrons between Complex I/II and Complex III in the electron transport chain.

Question 10

How many electrons does NADH-CoQ reductase carry in the electron transport chain?

Answer 10

2

Question 11

What is the role of the alpha, beta-hexamer in ATP synthase?

Answer 11

The alpha, beta-hexamer undergoes conformational changes to facilitate the binding and synthesis of ATP during the process of proton flow.

Question 12

True or False: Flow of protons from the intermembrane space into the mitochondrial matrix is crucial for ATP synthesis by ATP synthase.

Answer 12

True. The flow of protons through ATP synthase drives the enzyme’s function to produce ATP.

Question 13

What process is responsible for driving the rotation of the gamma-subunit in ATP synthase?

Answer 13

The flow of protons through ATP synthase drives the rotation of the gamma-subunit

Question 13

What does the rotation of the c-subunit ring in ATP synthase contribute to?

Answer 13

Contributes to the proton gradient used for driving ATP synthesis in ATP synthase.

Question 14

Why does the movement of electrons from glucose to oxygen release energy?

Answer 14

Oxygen has a higher redox potential than glucose