BI110 Study Guide - Midterm Guide: Integral Membrane Protein, Dna-Binding Domain, Peripheral Membrane Protein
Document Summary
Components (bacteria also have cytoskeleton but animal and plant cells have these components) Microfilaments (maintain cell shape; made of actin) Microtubules (motility-cilia/flagella, cell division, made of tubulin) Intermediate filaments (more permanent structures, variable compositions (keratin, lamin)) The way chloroplasts move towards or away from light is due to cytoskeleton. Photoreceptor (phototropin- response to light to move chloroplast) In the cytoskeleton and its compared to eyespot. Alpha-helical structure that intertwines with each other (thicker and more permanent than actin microfilaments) Variable composition (kerotin- abundant in our nails and hair) Eukaryotic flagellum (allow single celled organisms to move through space) Classic 9+2 structure that makes up flagella. 9-pairs of microtubules that extend all the way down. 2-pairs of the two microtubules that are central. Dynein arms connect microtubules (motor proteins use atp to change conformation and allows them to bend) Marks the spot where microtubules start (microtubules organization centre- also important in mitosis) Complexity of extracellular matrix in animal cells.