Exam2regular2008_KEY-1

Exam2regular2008_KEY-1 - KEY Exam 2 Biology 101 Section 2...

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KEY Exam 2 Biology 101 Section 2 (Mahar section) Porter/Normark 26 March 2008 REGULAR VERSION Requests: A. Please sit apart from one another; every other seat is fine. B. Turn off your phone. No phones, notes, books, study sheets, calculators or other study aids are permitted. C. Unlike the PRS questions, you may not discuss answers to these questions with others during the exam. D. Use #2 pencil on the scantron sheets provided. E. Fill in your name and student number on the scantron sheet. FILL IN THE BUBBLES TOO! F. If a question doesn't seem to make sense, don't hesitate to ask for clarification. We will try our best to help you understand what we are asking (without giving away the answer). G. After the exam, check the course web site for answers. H. The exam lasts about 1 hour, but you may stay until you complete the exam. I. Choose the best answer for each question. J. As soon as you feel distracted, or in any way lose focus, skip to the next question and start with a fresh mind. K. Good luck!
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KEY p. 2 1. Check the front of the exam: Which exam version are you taking? It is possible to get either version, no matter whether you are taking the exam at the makeup or regular time. (You get 1 point; 0 points if it turns out that you put the wrong answer down.) a: Makeup version. b: Regular version. 2. Which IS NOT a lipid bilayer membrane? a: the basilar membrane. b: the plasma membrane. c: the membrane of the sarcoplasmic reticulum. d. All the above are lipid bilayer membranes. 3. Which event DOES NOT involve signal transduction ? a: The pituitary gland releases a steroid hormone that regulates gene expression in the nucleus of a cell. b: An action potential traveling from one end of an axon or muscle cell to the other. c: The release of Ca ++ leading to muscle contraction. d: Your recognition that a radiator you're leaning against is hot. e: Vibration of a chimpanzee's tympanum (ear drum) causing it to hear sound. 4. One of these five (supposed) attributes of heme groups is FALSE . Which one? a: The heme binds to H + . b: The heme binds to O 2 . c: The heme binds to CO 2 . d: Iron (Fe) is the active atom at the core of a heme. e: Its ring structure reduces the binding strength of the active atom at its core. 5. Which of these statements IS NOT a property of countercurrent exchange ? a: Under the right conditions, virtually all the diffusible molecules can be transferred from one flow direction to the other. b: Countercurrent exchange illustrates one of the rare cases where the so-called 'laws of diffusion' are relaxed, permitting a more desirable physiological outcome. c: Molecules diffuse down their concentration gradients along the entire contact surface of the counter-flowing system. d:
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Exam2regular2008_KEY-1 - KEY Exam 2 Biology 101 Section 2...

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