BIOL 0280 Midterm: Exam1 2009 key
Document Summary
Make sure that your name is on every page. This is the only way we have of matching you with your exam after grading it. Unless otherwise indicated, there is only one correct answer for each multiple choice question. Points are indicated by the question within brackets []. there are no calculators or other electronic devices needed or allowed on this exam. Also all hats must be removed during the exam. Exams will be photocopied before being returned on thursday. Ans: near ph = 7, the carboxylic acid group ( cooh) will dissociate to become a negatively charged coo group, and the nh2 amino group will attract a proton to become a positively charged nh3. + group: [2 points] two amino acids of the standard 20 contain sulfur atoms. They are: cysteine and serine, cysteine and threonine, methionine and cysteine, methionine and serine, threonine and serine.
