BIOLOGY 1A03 Chapter Notes - Chapter 4: Nuclear Localization Sequence, Carboxylic Acid, Protein Folding

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Rosa Da Silva

Document Summary

Protein functions: transport and signaling, movement and structure, enzymes, defense. Gene: the dna sequence that corresponds to a specific protein product. Every aspect of cell"s existence depends on proteins. Central dogma of molecular biology is the pathway from dna to mrna to protein occurs in nucleus. In prokaryotes transcription and translation occur in the cytoplasm but in eukaryotes transcription i. e. proteins in cytosol have hydrophilic core and hydrophobic exterior to dissolve in cytosol. Hows the actual relative size and location of each atom, representing atoms with different colours. Lines represent the backbone of the protein polymer and emphasizes secondary structures (i. e. alpha helix: ball and stick model. Draws attention to atoms in the amino acid chain. Nucleus: double membrane-bound domain that contains chromosomes which pack and control dna molecules. Nucleolus: ribosomal rna molecules are transcribed into mrna; also involved in ribosomal production the information in a gene (dna) is transcribed into a copy (mrna)