Bio93midterm2006ss1+A

Bio93midterm2006ss1+A - Student Name _ Student ID # _ Seat...

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Student Name __________________________ Student ID # _________________ Seat # _____ A1 i Bio Sci 93 Midterm Summer Session 2006 Read and follow carefully the instructions below: 1. Ensure you are sitting at your assigned seat . 2. Record your Name, Student ID # and Seat # on each page of the exam booklet. Keep your student ID out and visible. We will be checking during the exam. 3. For multiple choice questions, only use pencils. 4. For the last two pages, use ballpoint pen. If you use pencil, no regrades will be allowed. Only write in the boxes provided. If you make a mistake, cross it out and write/draw on the back. 5. If you have a question, raise your hand and remain seated. 6. At the end of the exam pass your exam booklet to the center aisles and remain seated. You will not be able to get up until the exam is finished. Acts of dishonesty during the examination will result in disqualification (score of 0 points) and a permanent letter added to your university transcript file.
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Student Name __________________________ Student ID # _________________ Seat # _____ A1 ii Points Page 4 Page 5 Total
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Multiple Choice Test A1 (Multiple choice questions are worth 2 points each; 25 Q x 2 = 50 points) 1. Which test are you taking ? (This question is used to set the correct scantron answer key) a. Test A1 b. Test B1 c. Test A2 d. Test B2 2. Which of the following are present in the plasma membrane ? a. Glucose monomers b. Nuclear pores c. Nuclear receptors d. Na + /K + pumps e. Ribosomes 3. Which of these molecules can freely cross the plasma membrane ? a. Oxygen (O 2 ) gas b. Insulin (peptide hormone) c. Testosterone (steroid sex hormone) d. Ca 2+ ions e. A and C only 4. According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids? a. They have hydrophilic tails in the interior of the membrane. b. They frequently flip-flop from one side of the membrane to the other. c. They occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane. d. They can move laterally along the plane of the membrane. e. They can easily depart from the membrane and dissolve in the surrounding solution. 5. Which of these statements about eukaryotic organelles is incorrect ? a. Chloroplasts are only found in plant cells b. Mitochondria are only found in animal cells c. The Golgi is part of the endomemebrane system d. The nucleus has a double membrane e. Lysosomes are involved in autophagy 6. Aquaporins are water channels. Which statement is correct ? a. Aquaporins allow water to flow against its concentration gradient b. Aquaporins are selectively permeable to water but exclude cations e.g. Na+ c. Water can only flow through aquaporins from the outside to the inside d. Aquaporins actively transport water across the membrane e. Aquaporin channels open when modified by ATP phosphorylation 7. Which statement about sodium-potassium (Na+/K+) pumps is incorrect. a.
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This note was uploaded on 07/24/2010 for the course BIO 93 taught by Professor Gundy during the Spring '06 term at UC Irvine.

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Bio93midterm2006ss1+A - Student Name _ Student ID # _ Seat...

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