Lecture 09_21 - Ribosomes are present and synthesize...

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Main Points Some thoughts from Dean Laude Why are there two prokaryotic domains? Eukaryotic cells have many compartments which allow for specialization.
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The three domains of life.
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Suppose you’re trying to convince a friend that Archaea should be classified in a domain of its own, separate from Bacteria and Eukarya. Your friend, however, is stubbornly insisting that Archaea and Bacteria should be grouped together in the same domain, on the rationale that they are all prokaryotes. What do you say to your friend? Defend your position with at least three types of evidence.
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Gram-positive Gram-negative Bacteria have peptidoglycan cell walls. Archaea do not.
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Membranes in the three domains Wikipedia Eukaryotes Bacteria Archaea
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Bacteria, Archaea, or Eukarya?
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Bacteria, Archaea, or Eukarya?
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Eukaryotic cells have compartments
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The Nucleus
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Free ribosomes
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Unformatted text preview: Ribosomes are present and synthesize protein in all three domains. The structure of bacterial ribosomes is different than the structure ribosomes in archaea and eukarya. Antibiotics that affect bacterial ribosomes. , , and erythromycin Ribosome structure in the three domains. The Endomembrane System Smooth ER 1. 2. Cell structure reflects cell function. Using your knowledge of the functions of particular organelles, select the incorrect match of a type of cell and the organelle that you might expect to be particularly abundant in that cell: a. Pancreatic cell that secretes a digestive enzyme: Rough endoplasmic reticulum b. Mammalian skin cell: Central vacuole c. Skeletal muscle cell: Mitochondria d. Liver cell that modifies toxins: Smooth endoplasmic reticulum e. Leaf cell: Chloroplasts...
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Lecture 09_21 - Ribosomes are present and synthesize...

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