NCIt definition : A genetic process in which single-stranded RNA with base sequence complementary to
a region of plus strand DNA is synthesized by DNA-dependent RNA polymerases. Following
the binding of RNA polymerase on DNA promoter regions, the RNA product is synthesized
in a 5' to 3' direction, elongating RNA along the DNA strand as the polymerase proceeds,
accompanied by unwinding and rewinding of the DNA template.;
Alternative definition : NCI-GLOSS: The process of synthesizing messenger RNA (mRNA) from DNA.; CDISC: An assessment of transcribed RNA molecules in a biological specimen.;