Biology 1201A Lecture Notes - Scanning Electron Microscope, Nuclear Lamina, Intermediate Filament

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Biology exploring the diversity of life (russell, wolfe hertz , starr) necessary. Lab coat, safety glasses, closed toed shoes, long pants (lab manual essential) Characteristic of living things: organisms tend to be complex and highly organized, living organisms have the ability to take energy from the environment, organisms tend to be homeostatic they regulate their bodies and other internal structures. Living things reproduce themselves by making copies of themselves. Life adapts and evolves in step with external changes in the environment. Resolution limit of light microscope is about 0. 2 microns (size of a small bacterium remember 1 micron is 0. 001mm) To observe a surface, look at the scanning electron microscope. The nuclear side of the envelope is lined by the nuclear lamina, a network of intermediate filaments that maintain the shape of the nucleus. Cytoplasm consists of water (approximately 80%), nucleic acids, protiens, lipids and carbohydrates.

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