BIOL 210 Lecture Notes - Lecture 4: Microfibril, The Plant Cell, Protoplast
Document Summary
Describe the four components of the primary cell wall (cellulose, hemicelluloses, pectins, proteins) and the function of each component: cellulose, carbohydrate, chief component of cell wall. Lots of pectins = lots of water: primary pit field: thinning of the primary wall, plasmodesmata are aligned with er, therefore cells all connected, large molecules can pass through how viruses can spread through cells and infect. Identify human uses of cellulose and its derivatives: used to make, clothing, paper, cellophane rayon, dietary fibre food additives (thickener, biofuels. Predict the axis of elongation of an expanding plant cell from the arrangement of the cellulose microfibrils in its primary cell wall: the orientation of cellulose microfibrils within the primary wall influences the direction of cell expansion. If the cellulose fibrils are randomly oriented in all walls, the cell will expand equally in all directions, tending to become spherical in shape.
