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The liver GL

A2 Revision questions

QuestionAnswer
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.
Created by: 620048667
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