Fall 2009 Exam 2 - NAME EID SIGNATURE BIO 311C FALL 2009...

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NAME: EID: SIGNATURE: BIO 311C, FALL 2009, EXAM TWO: VERSION B On the scantron, please bubble in your last name and first name. Also bubble in your EID in the ‘Identification’ section. Indicate the version of the exam you are taking (A or B) in the ‘Test Form’ section. Each multiple choice question is worth 2.5 points. There are 30 multiple choice questions (for a total of 75 points possible). There are four matching/essay questions. They range in value from five points to 10 points each (for a total of 25 points possible). You have 50 minutes to complete this exam. Please bring an ID with you as you turn in your exam. 1) Primary endosymbiosis involves the engulfment of a bacterium by another free living organism. Secondary endosymbiosis occurs when the product of primary endosymbiosis is itself engulfed and retained by another free living eukaryote. Which of the following kingdoms can trace the origin of all its members to secondary endosymbiosis? a. Monera b. Plantae c. Fungi d. Animalia e. Protista 2) Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells? a. Prokaryotes are unable to secrete proteins because they lack an endomembrane system. b. The mechanism of protein secretion in prokaryotes is probably the same as that in eukaryotes. c. Prokaryotes have no need to secrete proteins outside of their plasma membranes. d. Prokaryotes do not secrete proteins because they lack ribosomes. e. Proteins that are secreted by prokaryotes are synthesized on ribosomes bound to the cytoplasmic surface of the plasma membrane For questions 3 to 5, please use the following categories: 1. Photoautotroph 2. Chemoautotroph 3. Photoheterotroph 4. Chemoheterotroph 3) An organism that obtains its energy from non-organic sources
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1 only b. 1 and 3 c. 2 and 3 d. 1 and 2 and 3 e. 1 and 3 and 4 4) An organism that obtains its carbon from organic compounds a. 4 only b. 2 and 4 c. 3 and 4 d. 1 and 3 and 4 e. 1 only 5) An organism that obtains both carbon and energy by ingesting other organisms a. 2 and 4 b. 4 only c. 1 and 3 and 4 d. 1 only e. 3 only 6) A biologist is studying kidney tubules in small mammals. She wants specifically to examine the juxtaposition of different types of cells in these structures. The cells in question can be distinguished by external shape, size, and 3-dimensional characteristics. Which would be the optimum method for her study? a. transmission electron microscopy b. scanning electron microscopy c. light microscopy using stains specific to kidney function d. light microscopy using living unstained material e. cell fractionation 7) Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large and complex lipids. Which cellular organelle must be involved in this condition? a. mitochondria
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Fall 2009 Exam 2 - NAME EID SIGNATURE BIO 311C FALL 2009...

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