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Download 8.2 Cell Growth and Reproduction
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Transcript
8.2 Cell Growth and Reproduction Part 1. Cell Growth Cell Growth What limits the size of a cell? Cell Growth What limits the size of a cell? 1. Diffusion is slow Day 7 Cell Growth What limits the size of a cell? 1. Diffusion is slow 2. DNA takes time to copy instructions for building proteins Cell Growth What limits the size of a cell? 1. Diffusion is slow 2. DNA takes time to copy instructions for building proteins 3. Surface area to volume ratio is low when a cell gets too big Cell Reproduction Before they get too big to function, cells divide Two cells identical to the original are produced Cell Reproduction Chromosomes – structures that contain genetic material DNA coils up into chromosomes just before cell divides Chromatin – uncoiled DNA The Cell Cycle The sequence of growth and division of a cell Growth period = Interphase Division into two daughter cells = Mitosis
