Lecture7bio - • Membrane-bound Organelles • Nucleus •...

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BIOLOGY 1001 Friday, February 8, 2008 Lecture 8 Cell Structure & Function Chapter 5 Pages 75-96 Cell Theory Pg. 76 of textbook 1. All living things are composed of one or more cells. 2. The cell is the smallest unit with properties of life. 3. Cells come from preexisting cells. Basic Features of All Cells 1. Plasma Membrane (PM) 2. DNA – Heredity 3. Cytoplasm 4. Metabolism 5. Cells are Small Page 76 Prokaryotic Cells Small, 1-5µm No membrane-bound organelles No nucleus DNA in circular loop Bacteria & Archaea Page 80 Question: Prokaryotic cells have organelles. Answer: False
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Eukaryotic Cells Larger, 8-100µm
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Unformatted text preview: • Membrane-bound Organelles • Nucleus • DNA in linear chromosomes Single-celled Protists Multi-celled animals, plants, and fungi The Nucleus • Chromatin Threads (Chromosomes) • Nucleolus • Nuclear Envelope • Pores Figure 5-5 Ribosome’s • Protein synthesis • Made of RNA & Protein • Free (cytoplasm) or attached to rough ER Figure 5-7 Page 85 Question: Prokaryotic cells do not have membrane bound organelles. Which of the following statements is true about ribosome’s? Answer: Ribosome’s are not membrane bound....
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