what is transcription and what is the primary enzyme involved

Question

anonymous · Answer

transcription is the process of forming RNA from the genome (DNA). the RNA is then further processed and can have various funtions, but mainly protein synthesis. the main enzyme involved is the DNA-dependent RNA-Polymerase

anonymous · Answer

a)    The Double DNA strand in the nucleus unwinds in the area of the gene containing the information about he protein to be made. The enzyme RNA polymerase moves along the stand linking complementary RNA nucleotides together to form an mRNA stand. The 'start'condon and a 'stop' condon control the length of the mRNA strand.

b)     After the whole gene has been copied, the mRNA strand is modified so that is consists only of the base sequence that will code for the protein. This is because most genes contain non-coding regions known as introns. The regions coding for the protein are known as exons. While still in the nucleus, the introns are cut out (spliced) from the strand and the exons joined together. The modified mRNA then moves from the nucleus into the cytoplasm