FinalKey.07

FinalKey.07 - Bio 221 Fall 2007 Multiple choice. 1 point...

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Bio 221 Fall 2007 FINAL EXAM Multiple choice. 1 point each. 1. Prions are infectious agents that contain A. RNA and protein B. DNA and protein C. RNA, DNA and protein D. RNA only E. protein only 2. Prokaryotes are organisms without A. internal membranes B. cell walls C. cell membranes D. ribosomes E. nucleic acids 3. Which of the following is true about hydrogen bonds? A. They can occur only between molecules containing N-H, C-H or O-H. B. They are an example of covalent bonding. C. They can only occur in water. D. They are charge interactions between polar covalent molecules. E. They are charge interactions between temporary fluctuating dipoles. 4. Which of the following describes the hydrophobic effect? A. Temporary charge interactions between hydrophobic molecules B. Covalent bonds between hydrogen and carbon C. Hydrogen bonding of water around hydrophobic molecules D. Formation of H 3 O + and OH - from 2 H 2 O E. Ions surrounded by charge-coordinated water molecules 5. Which of the following amino acids does NOT have D- and L- stereoisomers? A. Phenylalanine B. Glycine C. Glutamate D. Valine E. Lysine
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6. Which of the following lipids would be the most solid at room temperature? A. Lipids with 3 saturated fatty acids B. Lipids with 3 cis-unsaturated fatty acids C. Lipids with mixed cis- and trans-unsaturated fatty acids D. Phospholipids E. Phospholipids + cholesterol 7. This type of microscope bounces light off the specimen by using a ring condenser. It is especially useful for viewing very thin specimens. A. Differential Interference Contrast Microscope B. Confocal Scanning Laser Microscope C. Atomic Force Microscope D. Dark-field Microscope E. Cryo-electron Tomography 8. This microscope is especially useful for viewing biofilms, since it can focus on one plane at a time of a thick specimen. A. Bright-field Microscope B. Scanning Electron Microscope C. Confocal Scanning Laser Microscope D. Atomic Force Microscope E. Fluorescence Microscope 9. Creation of a proton motive force in mitochondria depends on all of the following EXCEPT: A. charge separation B. the semi-permeable nature of the membrane C. electron transport D. proton pumps E. porins 10. A major difference between Gram negative and Gram positive bacteria is that . . . A. Gram positive cells have O-antigen sugars B. Gram positive cells have lipoteichoic acids as major surface antigens C. Gram positive cells have a periplasmic space D. Gram negative cells have cross-linked peptidoglycan E. Gram negative cells have a waxy coating outside the membrane 11. Which of the following can hydrolyze existing peptidoglycan? A. Penicillin B. Tetracycline C. Sulfonamide D. Lysozyme E. Vancomycin
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12. Which of the following transporters requires a proton gradient, not just a membrane potential, in order to move molecules across a membrane? A.
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FinalKey.07 - Bio 221 Fall 2007 Multiple choice. 1 point...

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