BIOL 11000 Lecture Notes - Lecture 20: Nonsense Mutation, Genetic Disorder, Mutation
19 Oct 2016
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Document Summary
Composed of small and large protein subunits, which have different functions. Made of proteins and rrna (ribosomal rna) Small subunit acts like a conveyor belt for mrna. Prokaryotic ribosomes smaller & slightly different, allowing antibiotics (tetracycline and streptomycin) to inactivate them without interfering with a patient"s natural ribosomes. Sets of 3 nucleotides on mrna form codons trna carries amino acid from cytoplasm to ribosomes. Which are complementary sets of anticodons on trna. Almost all codons are the same across all organisms, so far. Each codon corresponds to an amino acid. Redundancy: more than one codon codes for the same amino acid, but one codon never codes for more than one amino acid. Lysine can be either aaa or aag, but they code for nothing else. Some proteins are changed before being functional. Attachment of carbohydrates, lipids, and phosphate groups. Removal of amino acids has already made. Your cell is allowed flexibility by being able to modify the proteins it.
