161 reviews of The Second City Theatre Probably one of the coolest spots in Toronto! This place is always full of life and loud laughter, you go in not expecting much, and always impresses! The cast keeps changing every now and then along withâ¦
how do mutations give you cancer. some mutations of DNA in body cells affect genes that control cell division. describe how point mutations and frameshift mutations affect the synthesis of proteins. Point mutations change only one nucleotide in a codon, therefore only changing one amino acid in a protein. Point mutation does not affect the synthesis of proteins.
Point Mutations. A point mutation is a single-letter swap -- an exchange of two bases (adenine to cytosine, for example) at a single location in the DNA molecule. Since the sequence of letters in a gene determines the sequence of amino acids in the protein it encodes, a point mutation can change the amino acid sequence of the resulting protein. Sometimes a change in the protein's amino acid sequence can have dramatic results. For example, sickle cell disease occurs when a single-point mutation in the gene that encodes the hemoglobin molecule results in deformed red blood cells.