Second Bio Exam

Second Bio Exam - Biol 1201 Section 1 Examination Two...

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Biol 1201 Section 1 Examination Two Thursday, March 5 at 6:00 PM in Campbell Auditorium . Bring your LSUID and a number two pencil. I'll provide the questions and a scantron. There are 54 questions = 108 points. Focus on the material covered in lecture, the corresponding chapters in the text are indicated in the syllabus, chapters 7 through 10. Know the material well! Read the exam questions and answers carefully. One study suggestion - If you have a study partner, try to explain the summary figures from the chapters and the figures listed in this study guide to one another. Often if you stare at a figure long enough you think you have it down. However, if you try to explain it to someone, it becomes clear whether you really do understand it. Membranes and membrane function 10 Questions How are membranes adjusted for different temperatures? Membrane fluidity- An increase in saturated fats will increase the fluidity Transport of materials across the membrane- What types of molecules can move across the membrane? Very small uncharged particles/molecules and hydrophobic Transport Processes : Simple diffusion-passive transport w/o the help of proteins (carrier proteins) Facilitated diffusion – passive transport with help of proteins Active Transport-movement against the conc. Gradient requires ATP Tonicity (isotonic- = water potential, = # of solutes dissolved, no net movement. Hypertonic-lower WP, more solutes dissolved, gain water(thirsty). Hypotonic-higher WP, less solutes dissolved, loses water (fat hippos) Aquatic organisms Marine invertebrates(free amino acids) and sharks(urea) isotonic w/sea water. Freshwater bony fish[teleost fish](hypertonic to fresh h2o) Marine bonyfish[teleost] hypertonic from lecture Osmosis-net movement of water across a semipermeable membrane and the direction of net water movement Figures 7.2, 7.3, 7.5, 7.11, 7.12, 7.13 , 7.16, 7.17 Enzymes 7 questions Function of enzymes-regulated by protein catalysts (breaker downer lipids to fatty acids) How they work-synthesis of energy carrier molecules to store energy transported from place to place, regulate flow. Couple reactions together so that unfavorable reactions can occur at the expenseof reactions that release energy. Lower activation energy (E a or Δ G )which speeds up reaction rate bcuz its catalyzed Coenzymes-small organic protein molecules that carry chemical groups between enzymes Inhibition (Figures 8.17(Catalytic Cycle), 8.19(Enzyme Inhibition, 8.20 and 8.22) Competitive-fighting for active site, Noncompetitive-fitting in its own active site, Allosteric(Multiple active sites), Feedback(active site used but then closed) 1
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Circe Effect ( enzyme lures its substrate
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This note was uploaded on 08/22/2010 for the course BIOL 1201 taught by Professor Wishtichusen during the Spring '07 term at LSU.

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Second Bio Exam - Biol 1201 Section 1 Examination Two...

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