BIOL 1090 Study Guide - Final Guide: Microtubule Organizing Center, Tobacco Mosaic Virus, Alpha Helix
Document Summary
Dynamic network of interconnected filaments and tubules that extend throughout the cytosol in eukaryotes. 13 of these protofilaments form a hollow cylinder longitudinally. Direction of movement of material along mt. Within the cell,, this leads to rapid turnover of most mt: dynamic. Shrinkage may occur rapidly at the plus end: catastrophe. Formation is controlled, central site of assembly: Also mediate interaction with other cell structures. Alpha helical domain wraps around each other to make rope like dimer. Monomer aligned parallel with diff n- and c- terminus. Monomers are incorporated into filaments in the same orientation. Filaments can be loose arrays/ networks or tight bundles. Ribonucleic acid (rna) and deoxyribonucleic acid (dna) are both polymers. Nucleic acids- macromolecules composed of repeating subunits called nucleotides. Mediates base pairing (pyrimidine and purine group to form double helix) Chromosomes of eukaryotes are composed of proteins, dna and rna: first level condensation, packaging dna into nucleosomes (11nm)
