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7 October, 04:05

An amine group that is removed from an amino acid within a hepatocyte is then a. sent to a mitochondrion to enter the citric acid cycle. b. used to generate bile salts and excreted in the feces. c. converted to urea and eliminated as part of urine. d. used to form a peptide bond between a protein and a lipid.

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  1. 7 October, 04:18
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    c) option is correct

    Explanation:

    Urea is the chief nitrogenous waste of mammals and most of our nitrogenous waste comes from the breakdown of amino acids which occurs by deamination Deamination of amino acids results in the production of ammonia (NH3) Ammonia is an extremely toxic base and its accumulation in the body turns out be fatal However, the liver contains a system of carrier molecules and enzymes which quickly converts the ammonia (and carbon dioxide) into urea, this is called urea cycle One turn of urea cycle: consumes 2 molecules of ammonia, 1 molecule of carbon dioxide and creates 1 molecule of urea and also regenerates a molecule of ornithine for another turn Although our bodies cannot tolerate high concentrations of urea, it is much less poisonous than ammonia Urea is removed efficiently by the kidneys and is eliminated out in the form of urine
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