BSCI 105- Final Exam Guide - Comprehensive Notes for the exam ( 67 pages long!)
28 Mar 2018
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Document Summary
The cell as the fundamental unit of life. Prokaryotes the defining feature of the cell is the lack of internal membranes: cell wall/capsule, plasma membrane, cytosol, nucleoid body, ribosomes. Eukaryotes: plasma membrane allows compartmentalization of areas that can do different things, cell wall, cytosol, endomembrane system, organelles, cytoskeleton. Nucleus: large organelle that contains dna, double membrane - nuclear envelope. Set of membranes folded back on themselves to create giant pores that things like ribosomes can move in and out of. Molecules must enter and leave the nucleus through large protein complexes called nuclear pores. Nuclear lamina nuclear envelope supported by an internal array of structural proteins: chromosomes. Chromatin - dna + proteins: nucleolus. Endoplasmic reticulum: continuous with nuclear envelope. Lumen interior of er for compartmentalization. Lumen of nucleus connects to the lumen of the er. Enclosed compartment separate from the rest of the cell for storage. (ex. calcium) Site of multiple processes: lipid synthesis, metabolic reactions, calcium sequestration.
