What end does DNA polymerase add to?
DNA polymerases can only add nucleotides to the 3′ end of an existing DNA strand. (They use the free -OH group found at the 3′ end as a “hook,” adding a nucleotide to this group in the polymerization reaction.)
What are the 3 stages of transcription?
Stages of Transcription The process of transcription can be broadly categorised into 3 main stages: initiation, elongation & termination.
What happens to DNA after transcription?
Transcription is the process in which a gene’s DNA sequence is copied (transcribed) to make an RNA molecule. RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.
What unwinds the DNA in transcription?
Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter. This signals the DNA to unwind so the enzyme can ”read” the bases in one of the DNA strands. The enzyme is now ready to make a strand of mRNA with a complementary sequence of bases.
What does DNA contain the instructions for making?
DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.