Biology 1201A Study Guide - Nuclear Lamina, Prometaphase, Cytoskeleton
Document Summary
Took off in 1600"s in dutch republic when people started building microscopes. First person to coin the word cell to describe tiniest components of living system (plants) Enabled organelles, viruses, proteins etc. to be viewed. Magnification limit of 1000x (at higher magnification image blurs) Electrons flow and thus they can be seen as pictures. Surface of cell seen; not internal components. Take cells apart to study their components; need to isolate cells to study them. Centrifuge is used to fractionate cells and separate their major organelles. Simplest collection of matter which has all the properties of life. Perform all necessary functions to live and reproduce. Occur in every organism; highly specific to host. Some cause illness others cause no disease or outward sign of their presence. Can reproduce only when enter a cell (thus cause harm) No nucleus; all genetic information is in the nucleoid. Plasma membrane needs to be around the cell or it would not differentiate from surroundings.
