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The liver GL
A2 Revision questions
| Question | Answer |
|---|---|
| What is the role of deamination of amino acids and ammonia? | It removes the amino group of amino acids and forms ammonia. |
| Why does the liver remove ammonia? | Because its very soluble and toxic. |
| What process converts ammonia to urea? | The ornithine cycle. |
| Name the first three reactants of the ornithine cycle? | CO2, ATP, Ammonia. |
| What is the chemical formulae for urea? | CO(NH2)2. |
| Where does detoxification takes place? | In the endoplasmic reticulum inside the hepatocytes. |
| Name the enzyme that catalyses the breakdown of ethanol? | ethanol dehydrogenase. |
| Why is it vital to break ethanol down? | Because it is toxic and can cause considerable damage to cells. |
| What is produced when ethanol is catalysed by the enzyme ethanol dehydrogenase? | ethanal. |
| How is ethanal converted to ethanoate? | aldehyde dehydrogenase. |
| How could ethanoate be used in the body? | In the Krebs Cycle to produce ATP. |