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Question 80 / 110
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BIO-080
In malignant carcinoid syndrome, which substance is found in elevated amounts and is detected in the urine?
A. Phenylketone (phenylpyruvic acid — as in PKU)
B. 5-Hydroxyindoleacetic acid (5-HIAA)
C. Homogentisic acid (as in alkaptonuria)
D. Phenylpyruvic acid
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