BIOL 102 Chapter Notes - Chapter 6: Golgi Apparatus, Messenger Rna, Electron Microscope
7 Dec 2016
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Light microscope (lm) visible light is passed through the specimen and then through glass lenses, the lenses refract (bend) so that the image of the specimen is magnified and projected into the eye/camera. 3 important parameters in microscopy: magnification (ratio of object image to size), resolution (measure of clarity of image), contrast (difference in brightness between light and dark regions) Electron microscope (em) focuses a beam of electrons through the specimen or onto its surface. Nucleus directs protein synthesis by synthesizing messenger. Rna from dna provided then transported to the cytoplasm via nuclear pores. Ribosomes are made of ribosomal rna and protein: they carry out protein synthesis. Endoplasmic reticulum: consists of network of membranous tubules and sacs called cisternae. Smooth er: no ribosomes, function: synthesis of lipids, metabolism of carbs, detox of drugs and poisons, storage of ca. Rough er: studded with ribosomes, synthesis of protein, membrane factory for the cell, growing phospholipids in membrane.
