HLSC 2110U Lecture Notes - Lecture 12: G0 Phase, Stem-Loop, Start Codon
27 Feb 2019
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Document Summary
Exonuclease removes mismatched nucleotides: ex: adenine cannot bond with cytosine and must be excised, this process is important because it prevents mutations. Used in viruses that have rna and not dna and replicate their rna sequence to create dna. Use the machinery of the host cell that they are infecting. When the cell is not diving, it is in the g0 phase. There are a number of proteins that check the progression of mitosis and gives the green light for the cell to divide. Dna synthesis continues in the s phase. Mrna carries a message for what a protein is going to be composed of. That message therefore has to be turned into a protein. Each trna has a specificity to an amino acid. Transcription of a gene; sequence called the tataat box (in prokaryote) is recognized by the rna polymerases trna. Has complementary sequences allows the strand to form a hairpin loop due to the hydrogen bonds.
