Playpost Ch. 11

Question 1

Why does it make sense that acetyl-CoA stimulates the activity of pyruvate carboxylase?

Answer 1

A build up of acetyl CoA carboxylase signals insufficient oxaloacetate

Question 2

When is citrate cycle is inhibited, which 2 metabolites are exported to the cytosol for fatty acid and cholesterol synthesis?

Answer 2

Citrate and malate

Question 3

Which of the following statements about the chemiosmotic theory is true?

Answer 3

It requires an enclosed mitochondrial membrane

Question 4

What is the process called with mitochondria that describes coupling of an ADH oxidation with ATP synthesis?

Answer 4

Oxidative phosphorylation

Question 5

Studies of the inner mitochondrial membrane reveal its composition to be approximately 20% lipid bilayer, an 80% protein. What is true of these proteins?

Answer 5

The proteins are largely electron transport complexes and ATP synthase enzymes

Question 6

Identify the most correct, sequential order of electron transfers in the electron transport chain starting from FADH2

Answer 6

Complex II, CoQ, Complex III, cytochrome c, complex IV