Respiration: Glycolysis Flashcards
What is cellular respiration?
The release of energy from food molecules in the cells.
What happens to glucose in glycolysis?
It is broken down to pyruvate in the cytoplasm of cells.
What happens in the energy investment stage?
Intermediates of glycolysis are phosphorylated by ATP.
How is ATP generated in glycolysis?
By the addition of inorganic phosphate (Pi) to ADP in an energy pay-off stage.
What is phosphofructokinase?
The enzyme that catalyses the irreversible transfer of a phosphate from ATP to fructose-6-phosphate in glycolysis.
What is the key regulatory enzyme for glycolysis?
Phosphofructokinase (PFK).
When is PFK’s activity inhibited?
When ATP and citrate levels are high in a cell, so the cell no longer needs metabolic energy production to occur.
