BIOL3149 Lecture Notes - Lecture 4: Uracil, Purine, Cytosine
Document Summary
When you have a strain of dna, it always has a complement strand. Gene expression, above is where you get your mrna from. Every 3 base pairs are called codons and code for amino acids. When these get transcribed, you end up with rna. Rna polymerase comes in, binds strand of dna. It makes an rna chain complement of the chain that it"s synthesizing. Want coding strand, amino acid sequence you want, therefore you need an rna transcript of the leading one to get the complement and then you get the sequence???? mrna instead of thymine you have uracil replaced. Bacteria do things so fast, as your mrna strand is coming off, it"s already being bound by ribosomes. Ribosomes read mrna strand and puts the amino acid in for each codon. 30s subunits ???????? polypeptide chain, this needs to get folded into a functional shape oooooooo polypeptides.
