1.7 - Respiration - Flashcards

Question	Answer
Name two substances that inhibit phosphofructokinase	ATP and citrate
What happens to the rate of glycolysis when citrate accumulates?	Glycolysis slows down
Name three alternative respiratory substrates	Glycogen Starch Fat Amino acids Other sugars
Feedback inhibition regulates the production of which molecule?	ATP
Describe the role of high energy electrons transferred to the electron transport chain (2)	High energy electrons pass along the chain and release energy (1) This is used to pump hydrogen ions across the inner mitochondrial membrane (1)
State the role of oxygen in the electron transport chain	Oxygen acts as the final electron acceptor and combines with hydrogen ions and electrons to form water
What is phosphorylation?	The addition of phosphate to a molecule
Describe the role of the coenzymes NAD and FAD (2)	Transport hydrogen ions and high energy electrons (1) To the electron transport chain (1)
Where does the citric acid cycle occur?	In the matrix of the mitochondria
What is the name of the enzyme in the third stage of respiration which makes ATP?	ATP synthase
The enzyme phosphofructokinase catalyses what stage of respiration?	The energy pay off stage of glycolysis
Why is ATP only produced when required?	It conserves the cell's resources
When the rates of stages 1 & 2 of respiration increase, the supply of which substance also increases?	ATP
The inhibition of phosphofructokinase by citrate synchronises what?	The rates of glycolysis and the citric acid cycle

Resource summary

	Created by Calum Mooney over 8 years ago