RNA polymerase, is an enzyme that produces primary transcript RNA. In cells, RNAP is necessary for constructing RNA chains using DNA genes as templates, a process called transcription.
- makes RNA from a DNA template,
- uses a process that resembles the synthesis of a
DNA strand during DNA replication, and
- substitutes uracil (U) for thymine (T).
promoter, which is
- located in the DNA at the beginning of the gene
- a specific place where RNA polymerase attaches.
- RNA polymerase reaches a special sequence of
bases in the DNA template called a terminator,
signaling the end of the gene,
- polymerase detaches from the RNA and the gene,
- the DNA strands rejoin.
In the cells of prokaryotes, RNA transcribed from a
gene immediately functions as messenger RNA
(mRNA), the molecule that is translated into
. Definitions: biotechnology, DNA technology, recombinant DNA, genetic engineering,
humulin, genetically modified organism, transgenic organism, plasmid, vector, gene cloning,
restriction enzymes, DNA ligase, sticky end, DNA profiling, forensics, polymerase chain
reaction (PCR), short tandem repeats (STR)
Definitions: natural selection, population, evolutionary adaptation, evolution, fossils, fossil
record, paleontologist, biogeography, comparative anatomy, homology, vestigial structures,
comparative embryology, inference, modern synthesis, gene pool, genetic drift, gene flow,
bottleneck effect, founder effect, relative fitness, sexual selection, sexual dimorphism