34 Bacteria have cells defined by the Prokaryotic absence of organelles 35 The

34 bacteria have cells defined by the prokaryotic

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34. Bacteria have _______ cells, defined by the _______. Prokaryotic; absence of organelles 35. The two major components of cell membranes are _______ and _______. Phospholipids; proteins 36. Water is moving across a membrane from solution A into solution B. What can you infer? Solution A must have a lower solute concentration than Solution B. 37. Many foods—for example, bacon and salt cod—are preserved with high concentrations of salt. How can high concentrations of salt inhibit the growth of bacteria? High salt is hypertonic and causes the bacteria to shrink because water leaves the bacterial cell. 38. Penicillin interferes with __________________, causing bacteria to die from ______________. Cell wall synthesis; swelling of the cell 39. Gram-positive and Gram-negative bacteria are most commonly differentiated in the laboratory by __________. Whether or not a dye is trapped within the cells during the Gram staining procedure 40. Which of the following cellular components would not be a good target for an antibiotic? Phospholipids
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41. Insulin is a protein hormone secreted by certain pancreatic cells into the bloodstream. Which of the following organelles are involved in the synthesis and secretion of insulin? Rough ER, Golgi apparatus, Ribosomes 42. Eukaryotic & Prokaryotic cells contain DNA Ribosomes Cytoplasm Cell membrane 43. In which of the following ways does the action of streptomycin differ from the action of penicillin? Streptomycin interferes with the production of proteins in prokaryotic cells. Streptomycin does not cause the bacterial cell to burst. 44. Which of the following Is not associated with human cells?
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Cell wall 45. Sugars are large, hydrophilic molecules that are important energy sources for cells. How can they enter cells from an environment with a very high concentration of sugar?
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  • Fall '08
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