Consider a cell that is provided aspartate in which all carbons are radioactively labeled. Compounds in the cell are analyzed after the biosynthesis and subsequent breakdown of pyrimidines. Which of the following compounds would display no radioactivity signal during the analysis?
A) "$\beta$-alanine"
B) "glutamine"
C) "$\beta$-aminoisobutyrate"
D) "dihydrouracil"

Question

Quizplus · Accepted Answer

Glutamine is not derived from aspartate in the biosynthesis or breakdown of pyrimidines, so it would not display radioactivity if only the aspartate carbons were labeled.

Consider a Cell That Is Provided Aspartate in Which All β\betaβ

Consider a Cell That Is Provided Aspartate in Which All $\beta$