311C F08 Exam2B+A - Name _KEY_ Lecture Time _ Bio 311C F08...

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Name _________________ KEY ____________________ Bio 311C F08 Exam 2B Lecture Time __________________________________ You must write your name and lecture time on every page of the exam. Points will be deducted if you do not. On the scantron provided: (1) Write and bubble your name, (2) write and bubble your UTeID, (3) write your lecture time on the line ‘Unique #”, and (4) write you exam form (2B) above the longhorn. Points will be deducted if you do not. Multiple Choice. (2 points each) Choose the best response for each of the following. Record your answers on the scantron provided. 1. In the following metabolic pathway, the end-product, D, binds to a regulatory site on Enzyme 1 and inhibits its activity. Enzyme 1 Enzyme 2 Enzyme 3 A B C D This is an example of a. allosteric regulation. b. feedback inhibition. c. enzyme localization. d. (a) and (b) e. (a), (b), and (c) 2. The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that a. plant cells are capable of having a much smaller surface area to volume ratio than animal cells. b. plant cells contain a large vacuole that reduces the volume of the cytoplasm. c. plant cells have a much more highly convoluted (folded) plasma membrane than animal cells. d. animal cells are more spherical, while plant cells are elongated. e. the basic functions of plant cells are very different from those of animal cells. 3. Mycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which of the following would be true? a. They possess typical prokaryotic flagella. b. They are gram negative. c. They are subject to lysis in hypotonic conditions. d. They lack a cell membrane as well. e. They undergo ready fossilization in sedimentary rock. 4. In which of the following would you expect to find a cell with a predominance of free ribosomes? a. A cell that is actively producing cytoplasmic enzymes. b. A cell that is actively secreting proteins. c. A cell that is actively constructing its cell wall or extracellular matrix. d. A cell that is digesting food particles. e. A cell that is enlarging its vacuoles. 5. Which of the following is a statement of the first law of thermodynamics? a. Energy cannot be transferred or transformed. b. Energy cannot be created or destroyed. c. The entropy of the universe is decreasing. d. The entropy of the universe is constant. e. Kinetic energy is stored energy that results from the specific arrangement of matter. 6. The chemical reactions involved in cellular respiration are virtually identical between prokaryotic and eukaryotic cells. In eukaryotic cells, ATP is synthesized primarily on the inner membrane of the mitochondria. Where are the corresponding reactions likely to occur in prokaryotic respiration? a.
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311C F08 Exam2B+A - Name _KEY_ Lecture Time _ Bio 311C F08...

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