Question
Name the basic nitrogenous catabolite produced during protein catabolism in humans. In what form is it excreted out? Giving two reasons, explain why it is advantageous to eliminate it in the latter form rather than in its initial form.
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Answer
- The basic nitrogenous catabolite of protein is ammonia.
- It is excreted in the form of urea.
- Elimination of urea has the following advantages:
- Urea is far less toxic than ammonia and can be concentrated in the blood or urine.
- It's elimination requires sufficient quantity of water, which is much less compared to the elimination of ammonia.
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