biochem-midterm-1

biochem-midterm-1 - Chemistry and Biochemistry 153A Winter...

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Chemistry and Biochemistry 153A Winter 2009 Midterm Exam 1 Instructions: You will have 1 hour 30 minutes to complete this exam. You may use a pencil (recommended) or blue or black ink pen to write your answers. Other color inks will not be graded. Check that your answer sheet ID and your exam ID match. Only answers on the answer sheet, in the indicated space, will be graded; writing anywhere else will be ignored. Be sure to write your name on the answer sheet. Do not write in the score boxes on your answer sheet; you will be docked points if you do. For answers with a word or sentence limit, words beyond this limit will not be read or graded. For short-answer questions, including irrelevant or wrong information in your answer will cause you to lose points. Write legibly. If the grader cannot read your answer, you won’t get credit. Items you may have on your desk: - non-programmable scientific calculator, without its case or cover - writing utensil(s) - student ID ALL other items must be placed into a bag, which must be zipped up or closed and pushed completely under your chair. No hats allowed. (Head scarves are fine.) If you need to use the restroom, bring your exam to a proctor. Only one student may use the restroom at a time. If you finish within the first 1 hour 20 minutes, bring your completed exam ( questions and answer sheet ) and student ID to the front of the room. If you finish within the last 10 minutes of the allotted time, stay in your seat until the exam time expires and wait for further instruction. Expect to wait until all exams are collected and IDs checked. If you continue to write after ‘time’ is called, your exam will be taken and docked 10 points. 1/7
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Chem 153A, Winter 2009, Midterm Exam 1 Part I (15 points). Multiple Choice. The following questions (1-5) are worth 3 points each: 1. If an atom were magnified 1 million times, which of the following would most closely match its size? An invisible speck A grain of salt A pea A tennis ball A basketball 2. You want to determine the sequence of an unknown, unmodified tetrapeptide. How many different sequences are possible? 3 20 4 20 20 3 20 4 4 3 3 4 20 × 19 × 18 × 17 none of the above 3. Which of the following statements is correct? Water has a high dielectric constant and is able to dissolve polar substances well.
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This note was uploaded on 04/25/2010 for the course BIOCHEM 142637201 taught by Professor Dr.nelson during the Spring '09 term at UCLA.

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biochem-midterm-1 - Chemistry and Biochemistry 153A Winter...

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