BISC300 Chapter Notes - Chapter 3: Firmicutes, Ethanolamine, Sporangium
12 Sep 2016
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3. 1 use of the term prokaryote is controversial: bacteria and archaea have long been lumped together and referred to as prokaryotes. Prokaryotes lack a membrane-bound nucleus, a cytoskeleton, membrane-bound organelles, and internal membranous structures such as the er and golgi: bacteria and archaea are distinct taxa. Anammoxosome-this organelle is the site of anoxic ammonia oxidation, an unusual metabolic process that is important in the nitrogen cycle. Cytoskeletal elements are widespread in members of both domains and that some bacteria have extensive intracytoplasmic membranes. Because of these discoveries, some microbiologists thin the term prokaryote should be abandoned: microbiology is an exciting, dynamic, and rapidly changing field of study. 3. 2 bacteria are diverse but share some common features: shape, arrangement, and size. Two most common shapes are rods and cocci. They can exist singly or can be useful in their identification. Diplococci arise when cocci divide and remain together to form pairs.
