USMLE Step 1 Quiz
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BIOCHEMISTRY
Question 1 of 20
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A rapidly dividing malignant melanoma is found to have significantly upregulated metabolic pathways to support its growth and proliferation. These cells have a high demand for both energy and biosynthetic precursors.
In addition to providing reducing equivalents for biosynthesis, the pentose phosphate pathway directly contributes to tumor proliferation by producing which of the following essential precursors for nucleic acid synthesis?
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