BIOL130 Study Guide - Final Guide: Mitochondrion, Nuclear Membrane, Extremophile
26 Feb 2016
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Document Summary
Cells vary on size: single bacterial cell (i. e. lactobacillus) is a few micrometers. Cell shape widely varies: i. e. comparison between nerve cell and a paramecium. Chemical requirement of cells are very diverse: some require oxygen to live, while gas is deadly to others. Difference in size, shape and chemical requirement allow differences in cell function and specialization. All organisms composed of the same 20 amino acids (used to make protein: difference in sequence causes differing 3d shapes (conformation) Evolution occurs from mutation in genes daughter cells do not always match parent cells exactly: mutations can either be advantageous or disadvantageous causes less ability to survive and reproduce and vice versa. Asexual reproduction genes of both cells are pooled, and new generation is composed of wide combinations of genes survival of the fittest, reproduction. Cells were not made visible until seventeenth century light microscopes: uses visible light to illuminate specimens.
