Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) Stercobilin, a bile pigment, is the substance that gives fecal matter its brown color.
(2) Glycolysis and citric acid cycle intermediates are the starting materials for amino acid biosynthesis.
(3) The urea cycle participants arginine and citrulline are both nonstandard amino acids.

Question

Quizplus · Accepted Answer

1) True
2) False - Amino acids are synthesized from intermediates of glycolysis and the citric acid cycle, but not necessarily those specific intermediates.
3) False - Arginine and citrulline are standard amino acids, not nonstandard.

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