BIO 2133 Chapter Notes - Chapter 13: Precursor Mrna, Five-Prime Cap, Chromatin
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Information stored in nucleic acid can be decoded into a protein. Gene expression results from a series of processes. Information is transferred from dna template to rna complement. 1: this mrna transports coded information out of the nucleus, they associate with ribosomes, make proteins. 13. 1 the genetic code uses ribonucleotide bases as letters . 13. 2 early studies established the basic operational patterns of the code. Frameshift mutations: the contiguous sequence of nucleotides encoding a polypeptide when an insertion or deletion causes the reading frame to be shifted amino acid sequence is altered, starting where the mutation occurred. The code does not overlap at all. The commaless and degenerate nature of the code. No internal punctuation would occur along the reading frame. Originally, crick thought that 44 blank codes existed nonsense codons. If this were the case, when encountered in protein synthesis, the process would be terminated. 13. 4 the coding dictionary reveals several interesting patterns among the 64 codons.