Practice questions for Exam 1 - T ru e o r F a ls e A B io...

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True or False _____A. Biomolecular recognition (interaction between biomolecules) is mediated by covalent bonds _____B. The fact that weak forces determine the interactions between biomolecules means that organisms are restricted to living in a narrow range of environmental conditions. _____C. A mole of covalent bonds tends to have a much lower energy than a mole of ionic bonds. _____D. Your grade in this class is based on your performance on quizzes, exams and attendance. Write ONE grammatically correct sentence defining the term “hydrogen bond” then draw a hydrogen bond between a water molecule and another molecule that is BOTH amphiphilic AND contains a carboxylic acid functional group. Explain in two or three grammatically correct sentences why CH 4 is a gas at room temperature while H 2 O is a liquid. A weak acid, HA, has a K a = 1 X 10 -6 . What is the pH of a buffer made using this weak acid if the [A - ]/[HA] ratio is 10? Strong acid (e.g. H + ) added to a buffer will be neutralized to_________ when it reacts mainly with _______.
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