BIOL 1105 Lecture Notes - Lecture 4: Nuclear Membrane, Nuclear Pore, Peroxisome

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Aqueous space that allows all cell processes to occur. Compare with cytosol (the aeqeous gel like part) All cells use dna as information storage. All cell use rna as information transfer and processing (viruses) Diffusion of material into and out of cell. Works well on a small scale (very slow). as cells get bigger, diffusion is limited because takes longer this is a constraint on cell size. Smaller cells have a higher ratio and are much more functional. As cells grow, volume grows much faster than the surface area larger cells have harder time meeting metabolic needs. Plants have chloroplast, vacuole, cell wall while animal cells do not. Ecm - similar to peptidoglycan wall of bacteria. Protect, cushion, strengthen cell (when lose water, droop bc don"t have structural support) Made of cellulose, synthesized on the plasma membrane from glucose. Beta 1, 4 linkage very resistant to hydrolysis. Studded with nuclear pores reinforced by nuclear lamina.

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