3-24-2023 & 3-27-2023

Where is carbon dioxide produced in the mitochondrion?

• A

• B

• C

• D

Answer explanation

The removal of CO₂ during the link reaction and the Krebs cycle both occur in the matrix of the mitochondria.

Where would there be a high concentration of H⁺ protons?

• A

• B

• C

• D

Answer explanation

The electron transport chain drives H⁺ ions from the mitocondrial matrix (low concentration) to the intermembrane space (high concentration). Energy is needed to push H⁺ against the concentration gradient - that energy is supplied by the electrons from NADH and FADH₂.

Where do the reduced NADs and FADs deposit their electrons?

• A

• B

• C

• D

Answer explanation

The electron transport chain is what accepts the electrons from NADH and FADH2. It is located in the inner membrane (or cristae)

Where does oxidative phosphorylation occur?

Answer explanation

Inner mitochondrial membrane

Define phosphorylation

Answer explanation

When a phosphate is added to an organic molecule.

Where is ATP produced in cell respiration?

Answer explanation

Glycolysis (net 2), Krebs (2), ETC (34)

Why is it called oxidative phosphorylation?

Answer explanation

1. NADH and FADH2 are oxidized and deposit their electrons into inner membrane (cristae)

2. ADP is phosphorylated by ATP synthase during chemiosmosis (via ATP Synthase)