BIOL 1500 Lecture Notes - Lecture 6: Lac Operon, Trp Operon, Frameshift Mutation
9 Nov 2013
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Learning objectives week 6 http://www. biotopics. co. uk/genes/trans. html transcription and translation site from info below. Transcription: the 2 strands of the dna molecule are temporarily split by enzymes which cause a short part to be copied into a similarly short section of. The copying is along the same lines as already explained, (a for t, g for c, c for g) except that a different base called u (uracil) replaces t (thymine). Also, rna is only made of a single strand, and it contains a different sidechain subunit: the two strands of dna - shown here in black and grey - separate (under the influence of the enzyme rna polymerase). Messenger rna - here red - forms on one - black - strand of dna. Does not take part in the process: the strand of messenger rna (mrna) formed then leaves the nucleus and passes into the cytoplasm. The opened-up section of dna re-forms into a double helix, as before.
