practice exam - Biology 172 Exam 1 Practice Exam 1 Practice...

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Biology 172 Exam 1 Practice Exam 1 Practice These are questions from last term’s Bio172 exam. I would say that these questions plus the type of questions I asked with Qwizdom will give you an idea of what the exam will be like. Personally, I think the exam questions are alittle tougher. I will also send all the Qwizdom questions I have given you so far in a single file: there will be exam questions of this style as well. I may edit one of the Qwizdom questions based on feedback from the some students, to make it more clear. The makeup of your first exam will be 30 multiple choice (3-5 choices) questions spread evenly from lectures 1-9 and the first three discussion sections, and 3 short answer questions. 1
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Biology 172 Exam 1 Practice 1) Carbohydrates and lipids are both used as energy storage. Which of the following is a TRUE statement? A. carbohydrates form ß-pleated sheets while lipids do not B. carbohydrates contain sulfur, while lipids do not C. lipids have non-polar covalent bonds, while carbohydrates do not D. both lipds and carbohydrates have extensive hydroxyl side groups along the length of the carbon backbone E. carbohydrates are water soluble while lipids are not 2) Phospholipid bilayer membranes are selectively permeable. What is meant by the phrase “selectively permeable”? A. allows some things to cross while restricting others B. they are composed of select groups of phospholipids C. allows everything but water to cross D. allows only water to cross E. allows everything nonpolar to cross 3) Several of the molecules called vitamins act as enzyme cofactors. Vitamin deficiencies cause disease. What is the most direct explanation for this? A. None of the options are correct. B. Vitamins combine with nonprotein molecules to delay the onset of disease. C. If cofactors are missing, enzymes cannot function properly, and important reaction products will be absent from cells. D. Normal regulation cannot occur in the absence of cofactors. As a result, all enzymes will function all of the time. E. Cofactors inhibit enzymes found in disease-causing bacteria and viruses. When cofactors are absent, these disease-causing agents multiply. 4) What type of interaction is directly responsible for the formation of secondary structure in proteins? A. hydrogen bonds between the side chains of the amino acids B. peptide bonds between adjacent amino acids C. peptide bonds between cysteine amino acids D. peptide bonds between two different polypeptides E. hydrogen bonds between portions of the polypeptide backbone 2
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Biology 172 Exam 1 Practice 5) The simplified tree of life below shows the evolutionary relationships between Bacteria, Archaea and Eukarya. Which arrow corresponds to the origin of the
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practice exam - Biology 172 Exam 1 Practice Exam 1 Practice...

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