true or false

Question 1

Fatty acids are converted to acetyl CoA by the process of beta oxidation

Answer 1

True- even number of carbons is broken down to acetyl CoA. For an odd number of C atoms, the final round of beta oxidation will produce a proprionyl CoA molecule.

Question 2

Glycolysis takes place in the cytoplasm

Answer 2

True- Glucose is broken down to pyruvate by cytoplasmic enzymes.

Question 3

Cytochrome C is found in the mitochondrial matrix

Answer 3

False- This is in the electron transport chain, the bc1 complex transfers its electrons to cytochrome c on the outer face of the inner mitochondrial membrane

Question 4

Acetyl CoA can be used to provide glucose by the process of gluconeogenesis

Answer 4

False- Acetyl CoA cannot synthesise glucose in mammals and the two carbons that enter the TCA cycle leave as carbon dioxides

Question 5

Muscle glycogen is a major source of blood glucose

Answer 5

False- Glucose is released from the liver not the muscles

Question 6

Fatty acids can be synthesised by a reversal of beta-oxidation.

Answer 6

False- Malonyl CoA units are needed to start the chain synthesis

Question 7

ATP inhibits the regulatory enzymes involved in the production of acetyl CoA from glucose

Answer 7

True- Both phosphofructokinase and pyruvate dehydrogenase are directly or indirectly inhibited by high levels of ATP