NATS 1670 Lecture Notes - Lecture 32: Dna Replication, Peptide Bond, Transfer Rna
20 Apr 2017
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Document Summary
The three steps in elongation repeat down the length of the mrna: Assembled along a mrna to increase the rate of protein production. Human dna of one cell is ~2 meters long. In the living cell, dna undergoes frequent chemical change, especially when it is being replicated. Those that are not result in a mutation. Mutations can result from the incorporation of incorrect bases during dna replication. Most such spontaneous changes in dha are temporary because they are immediately corrected by processes collectively called dna repair. Most damage to dna is repaired by removal of the damaged bases followed by resynthesis of the excised region. A mutation is any change in an organism"s dna sequence. Proteins, encoded by the genotype, produce the phenotype. Hence, dna mutations affect phenotype only when the mutation is expressed (dna -> Not all mutations affect the protein"s ability to function and thus do not generate a phenotype.
