A person eats foods containing proteins. Some of the amino acids in the proteins are converted to urea and excreted from the body. $$ \text { proteins } \xrightarrow{1} \text { amino acids } \xrightarrow{2} \text { urea } \xrightarrow{3} \text { urine } $$ Which row identifies the sites of processes 1, 2 and 3? | Option | site of process 1 | site of process 2 | site of process 3 |
Explanation
The conversion of proteins to amino acids (process 1) occurs in the stomach, the conversion of amino acids to urea (process 2) occurs in the liver, and the excretion of urea as urine (process 3) occurs in the kidney and bladder.
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