4339359
Description
Flashcards by Calum Mooney, updated more than 1 year ago
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Created by Calum Mooney
almost 9 years ago
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| 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 |
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