Unit 1.7 Cellular Respiration

Question 1

Describe the role of dehydrogenase in glycolysis

Answer 1

During the energy pay off phase, dehydrogenase enzymes release hydrogen ions which are then picked up by NAD, becoming NADH

Question 2

Describe the role of dehydrogenase in the citric acid cycle

Answer 2

Dehydrogenase enzymes remove hydrogen ions and electrons from the respiratory substrate and pass them to NAD, becoming NADH

Question 3

Describe the role of ATP in phosphorylation

Answer 3

ATP can be broken down into ADP+Pi to provide the phosphate required for phosphorylation of glucose and intermediates during the energy investment phase

Question 4

State the location of the citric acid cycle

Answer 4

Matrix of mitochondria

Question 5

What is the role of NAD in respiration

Answer 5

NAD collects hydrogen ions and electrons and carries them to the electron transport chain

Question 6

State the location of the electron transport chain

Answer 6

The inner mitochondrial membrane