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Which of the following is a by-product of the catabolism of proteins?
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3. Energy & Cell Processes
Introduction to Metabolism
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Which is a major waste product of protein metabolism?
A
Carbon dioxide
B
Lactic acid
C
Urea
D
Glucose
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Understand that protein metabolism involves the breakdown of proteins into amino acids, which are then deaminated to remove the amino group.
Recognize that the removal of the amino group from amino acids results in the formation of ammonia, a toxic compound.
Learn that the liver converts ammonia into urea, a less toxic compound, through the urea cycle.
Identify that urea is then transported to the kidneys, where it is excreted from the body in urine.
Conclude that urea is the major waste product of protein metabolism, as it is the primary method of removing excess nitrogen from the body.
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