correlational
Analysis v1
Strong Support
Simple cells make their own pyrimidines from scratch or recycle them, but more mature cells mostly just recycle them—even though they could make new ones. This seems to be a basic rule in both animals and humans, including in tumors.
6
0
Evidence from Studies
Supporting (1)
6
Community contributions welcome
6
Nitrogen metabolism profiling reveals cell state-specific pyrimidine synthesis pathway choice
Cross-Sectional Study
Animal & In Vitro
The study shows that young, primitive cells build pyrimidines from scratch or recycle them, while mature cells mostly recycle them—even though they can make them from scratch. This matches the claim exactly.
Contradicting (0)
0
Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.