CITRIC ACID CYCLE (4th question group)

Question 1

what is the main role of CAC?

Answer 1

release hydrogens which can be used in oxidative phosphorylation to provide energy to make ATP

Question 2

where does CAC take place?

Answer 2

mitochondrial matrix

not in erythrocytes

Question 3

what is the total energy gain ?

Answer 3

12 ATP

Question 4

what enzymes regulate CAC/

Answer 4

citrate synthase
isocitrate dehydrogenase
succinate dehydrogenase

Question 5

How many molecules of acetyl CoA, an acetyl group attached to ‘coenzyme A’, are produced from a single molecule of glucose for participation in the Krebs cycle?

Answer 5

2

Question 6

How are electrons extracted from the citric acid cycle for use in the electron transport chain?

Answer 6

Reduction of NAD^+
+
start superscript, plus, end superscript and FAD

Question 7

High cellular concentrations of what molecule would inhibit the entry of pyruvate into the citric acid cycle?

Answer 7

NADH

Question 8

What powers the ATP synthase rotary motor?

Answer 8

H+ gradient