BIOL 1202 Lecture 3: chapt03_SSG

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1 Mar 2018
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This chapter provides a description of the prokaryotic cell, including bacterial and archaeal cells. The discussion begins with the general features of size, shape, and arrangement of prokaryotic cells. Then the general features of biological membranes and the specific features of prokaryotic membranes are given. The cell wall is discussed with special reference to the differences between the cell walls of gram-positive bacteria and gram-negative bacteria, differential staining reactions, and the nature of s-layers. Important internal structures of prokaryotes, such as the cytoplasmic matrix, ribosomes, inclusion bodies, and the nucleoid are described. Structures external to the cell, such as pili, fimbriae, and flagella lead into a discussion of cell motility and chemotaxis. The chapter concludes with a description of the structure and functions of bacterial endospores. 1 describe the three stages that transform an endospore into an active vegetative cells (germination)

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