Zoology Notes 4 - CHAPTER 3 CELLS AS UNITS OF LIFE A....

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Unformatted text preview: CHAPTER 3 CELLS AS UNITS OF LIFE A. Eukaryotic vs. Prokaryotic Cells 1. Prokaryotic Cells ( before + nucleus ) lack a nucleus Bacteria and cyanobacteria 1 st cell type to evolve Genetic material is located in region called nucleoid 2. Eukaryotic Cells ( true + nucleus ) DNA contained in a nuclear membrane Animals, Plants, Fungi, Protists . The Eukaryotic Cell ORGANELLES: Compartmented regions of the cytoplasm . Nucleus: storage and processing of genetic information. nucleolus: synthesis of subunits of ribosomes . Endoplasmic Reticulum (ER): Network of membranous channels extending through cytoplasm a. Rough ER: membranes studded with ribosomes; functions in protein synthesis b. Smooth ER: no ribosomes; functions in lipid synthesis . Golgi Body: Stacks of flattened membranes; functions in modification, packaging, and storage of ER products. . Ribosomes: protein synthesis; some attached to ER others free in cytoplasm . Vesicle: membranous sac in cytoplasm Fig. 3.4 ig. 3.10ig....
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Zoology Notes 4 - CHAPTER 3 CELLS AS UNITS OF LIFE A....

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