BIOL 1000 Chapter Notes - Chapter 15: Uracil, Ribosome, Peptide

• School: York University
• Department: Biology
• Course: BIOL 1000
• Professor: Nicole Nivillac

Document Summary

However proteins are synthesized outside of nucleus, in cytoplasm & on ribosomes. Since information for proteins is specified by dna & dna is not able to excit nucleus, a problem exists as to how the blueprint for building proteins will be brought to ribosomes. If allowed, it would be distorted, cleaved or damaged. Messenger rna (ribonu(cid:272)lei(cid:272) a(cid:272)id(cid:895) is a(cid:374) i(cid:374)te(cid:396)(cid:373)ediate su(cid:271)sta(cid:374)(cid:272)e. dna is t(cid:396)a(cid:374)s(cid:272)(cid:396)i(cid:271)ed i(cid:374)to a (cid:272)o(cid:373)ple(cid:373)e(cid:374)ta(cid:396)y rna (cid:373)essage that"s (cid:272)apa(cid:271)le of encoding genetic information. Many copies of message can be delivered to ribosomes. The ribosomes then translate message into polypeptide chains, (cid:449)hi(cid:272)h"(cid:396)e p(cid:396)o(cid:272)essed i(cid:374)to p(cid:396)otei(cid:374)s. Transcription: involves copying the information in dna into massager rna (transcribe- copy) Translation: ribosomes use massager rna as blueprint to synthesis protein composed of amino acids (translate- convert info). Ribosomes assemble amino acids in a specific sequence to synthesize a specific polypeptide coded by m-rna.