Transcription

• DNA is making mRNA which is a copy.
• DNA message is converted to an RNA molecule.
• DNA code is transferred to mRNA in the nucleus.
• DNA is unzipped in the nucleus by helicase.
• mRNA is synthesized by RNA polymerase and uses the DNA strand as a template.
• One side of the DNA molecule is the template for mRNA.
• RNA polymerase goes from 5' to 3'.
• The new RNA molecules require editing before they are read.
• 1 gene = 1 protein, as they code for a certain protein.
• Introns are excess code which is removed.
• Exons are the remaining code which is spliced (put together)
• Environmental factors can affect which part of the code is edited and removed.
• Splicing can be done differently and splicing wrong can cause diseases.
• mRNA code needs to be translated to a protein and the code needs to be changed to an amino acid sequence.