However , because thymidine is used in DNA but not in RNA ( where uracil is used instead ) , inhibition of thymidine synthesis via thymidylate synthase selectively inhibits DNA synthesis over RNA synthesis .
Anti-metabolites also affect RNA synthesis .
Because thymidine is used in DNA but not in RNA synthesis ( where uracil is used instead ) , inhibition of thymidine synthesis via thymidylate synthase selectively inhibits DNA synthesis over RNA synthesis .
Anti-metabolites also affect RNA synthesis .