[BIOL 2960] - Midterm Exam Guide - Comprehensive Notes for the exam (18 pages long!)
7 Feb 2017
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Lecture 3: cell structure & organization part 2. Frog eats a fly buzzing around a pond. Organisms are remarkably similar at the molecular level. Complex processes take place, but functions not compartmentalized. The processes that support life in bacterial cells are very similar to those in an animal cell. Inside of cell chemically different from environment, accommodates the biochemistry of life. Many pores in nuclear envelope to allow proteins and other materials to flow through. Pore made of proteins that facilitate movement; not just a hole in the membrane. Outside: protein synthesis = translation, many molecules move back & forth. Proteins that need to be kept away from cytoplasm (digestive enzymes) Various modification of proteins take place in rer. Ribosomes bound to rer are not a stable part of rer. Ribosome binds to rer when it is translating a protein destine for secretion -- contains signal peptide. Membranes of the nucleus, er, golgi and lysosomes form a network.
