classification - 5. Cell walls a. Occur only on plant...

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CLASSIFICATION - TAXONOMY BASIC CELL TYPES 1. TWO BASIC CELL TYPES (all living cells) A. Eukaryotic (“true nucleus”) - more complex B. Prokaryotic (“pre-nucleus”) - simpler, smaller 2. COMPARISON OF CHARACTERISTICS A. EUKARYOTIC CELLS 1. Possess a true “nucleus”. a. Nuclear material surrounded by a nuclear membrane. b. Nuclear material organized into paired chromosomes. c. Nuclear membrane (DNA) associated with proteins called histones - form the chromosomes. d. Nucleus contains nucleolus - sites of ribosome synthesis. 2. Internal structure more complex - contains organelles - each have a specific function. 3. Cytoplasmic streaming - continuous movement of the cytoplasm. 4. Cell membranes contain complex lipids - sterols (cholesterol).
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Unformatted text preview: 5. Cell walls a. Occur only on plant cells, fungi b. Composed of cellulose, chitin. 6. Division occurs by mitosis, meiosis. B. PROKARYOTIC CELLS 1. No true nucleus - nucleoid. a. No nuclear membrane. b. No paired chromosomes. c. No histones. d. No nucleolus. 2. No organelles. 3. No cytoplasmic streaming. 4. Cell membrane contains no sterols. 5. Cell walls a. All typical prokaryotic cells possess cell walls. b. Composed of peptidoglycan (murein). 6. Division - binary fission. C Microorganisms of each cell type : 1. Eukaryotic - fungi, protozoa, algae, worms 2. Prokaryotic - bacteria 3. Viruses - neither - acellular...
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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classification - 5. Cell walls a. Occur only on plant...

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