12.1 - Introduction to Respiration Flashcards
The role of respiration in synthesising ATP Aerobic and anaerobic respiration The four stages of aerobic respiration
What is the role of ATP?
Universal energy currency
How is ATP made?
Pi combined with ADP using energy from respiration
What type of reaction is ATP formation?
Anabolic
How is ATP regenerated during respiration?
Substrate-level phosphorylation
What is substrate-level phosphorylation?
Direct transfer of phosphate group to ADP
What is chemiosmosis?
Using proton movement to drive ATP synthesis
What type of reaction is substrate-level phosphorylation?
Substrate-linked reaction
What is respiration?
Enzymatic release of energy from organic compounds
What are the two types of cellular respiration?
Aerobic and anaerobic
What are the four stages of aerobic cellular respiration?
Glycolysis
Where does glycolysis occur?
Cytoplasm
What happens during glycolysis?
Glucose breakdown into pyruvate
What are the main products of glycolysis?
2 ATP
Where does the link reaction occur?
Mitochondrial matrix
What happens during the link reaction?
Pyruvate conversion into acetyl CoA
What are the main products of the link reaction?
1 acetyl CoA
Where does the Krebs cycle occur?
Mitochondrial matrix
What happens during the Krebs cycle?
Series of reactions starting with acetyl CoA
What are the main products of the Krebs cycle?
1 ATP
Where does oxidative phosphorylation occur?
Inner mitochondrial membrane
What happens during oxidative phosphorylation?
Electron transfer
What are the main products of oxidative phosphorylation?
Approximately 30 ATP
