BIOL 2051 Chapter : Structure And Function Study Questions
Document Summary
Structure & function: name 6 abilities of living cells, metabolism, communication, movement, reproduction, differentiation, Phase contrast: cell has black background, light shone directly on specimen, visualize live samples, no staining required. Darkfield: shadow cast, dimension of cells visible, visualize live samples, no staining required. Flourescent: visualization of auto fluorescent molecules or fluorescent stains, required uv lamp, cells usually die or become damaged because of the uv light, dapi: used to stain, typically stains the nucleus. Fluorescence: what must be done to a microorganism to be able to see it with brightfield light microscopy, must cut the cell, and stain them as well. Describe what that value means in practical terms when viewing a specimen. 2 m - this means any two organisms next to each other wont be seen as next to each other. 2 m 0. 2microns is the size of the smallest free-living pathogenic bacterium.
