DAT Biology: Cellular Metabolism 3

Question 1

The pyruvate dehydrogenase complex converts pyruvate into which molecule entering the citric acid cycle?

Accepted Answer

Acetyl-CoA

Answer

Citrate

Answer

Lactate

Answer

Oxaloacetate

Question 2

How many CO2 molecules are released per turn of the citric acid cycle?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 3

Which molecule combines with acetyl-CoA to form citrate?

Accepted Answer

Oxaloacetate

Answer

Malate

Answer

Succinate

Answer

Fumarate

Question 4

Per turn of the citric acid cycle, how many NADH molecules are produced?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 5

Which high-energy molecule is produced directly by substrate-level phosphorylation in the citric acid cycle?

Accepted Answer

GTP

Answer

ATP

Answer

NADPH

Answer

FADH2

Question 6

In which cellular compartment does the citric acid cycle occur?

Accepted Answer

Mitochondrial matrix

Answer

Cytoplasm

Answer

Inner mitochondrial membrane

Answer

Intermembrane space

Question 7

Which citric acid cycle enzyme is also a component of the electron transport chain (Complex II)?

Accepted Answer

Succinate dehydrogenase

Answer

Citrate synthase

Answer

Aconitase

Answer

Fumarase