Answer
False
Work Step by Step
It is not that DMBA is a specific mutagen, but rather that the Ras gene is converted to its activated, cancer-causing form by a particular A-to-T alteration that leads to a very specific amino acid change. DMBA causes mutations throughout the genome, but only those at the specific site in the Ras gene give rise to cells that have cancerous properties and thus are identified in the assay.
