Micro 01-30-08 - 1. Why can prokaryotic cells be smaller...

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Whitney Barter MC 1, 2, 3, 5 CT 1, 3 1/30/08 1. Which of the following is not a distinguishing characteristic of prokaryotic cells? e. They lack a plasma membrane. Are characteristics: usually have a single, circular chromosome, lack membrane-enclosed organelles, have cells walls containing petidoglycan, DNA is not associated with histones. 2. Which statement best describes what happens when a gram-positive bacterium is placed in distilled water and penicillin? d. The cell will undergo osmotic lysis. 3. Which statement best describes what happens when a gram-negative bacterium is placed in distilled water and penicillin? b. Water will move into the cell. 5. Which of the following statements best describes what happens to a cell exposed to polymyxins that destroy phospholipids? d. Intracellular contents will leak from the cell.
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Unformatted text preview: 1. Why can prokaryotic cells be smaller than eukaryotic cells and still carry on all the functions of life? Prokaryotic cells can be smaller than eukaryotic cells and still carry on the functions of life because they are the oldest cells on earth and were made to live in much harsher conditions. 3. Two types of prokaryotic cells have been distinguished: bacteria and archaea. How do these cells differ from each other? How are they similar? They are similar in the fact that they are microscopic organisms that have cell walls, a singular circular chromosome and may have flagella or cilia. They also reproduce by binary fission, have no membrane bound organelles. Archaea are extremophiles and form spores, while the cells walls of bacteria contain peptidoglycan....
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This note was uploaded on 05/05/2008 for the course BIOL 357 taught by Professor Kalia during the Spring '08 term at University of Louisville.

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