PS#3 - Sept 13 Answers

PS#3 - Sept 13 Answers - 1. Draw the structures of the...

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1. Draw the structures of the following functional groups in their un-ionized forms: (a) hydroxyl, (b) carboxyl, (c) amino, (d) phosphoryl. Ans: 2. How is water able to be a solvent for so many biological molecules? Ans:Many biological molecules have polar characteristics. Water is extremely polar and is capable of competing with other polar molecules by weakening their electrostatic and hydrogen bonds. The oxygen can act as a hydrogen- bond acceptor, and the hydrogen can act as a donor. 3. If most proteins are found surrounded by water in the cell, what type of functional groups would you expect to find on the surface of a water soluble protein? Ans:Polar and charged amino-acid residues would be present on the surface of the protein. 4. If the First Law of Thermodynamics is true, how can biological processes be carried out? Ans: Although energy cannot be created or destroyed, it can take on different forms, such as heat or chemical energy. Thus, the energy can be stored as chemical bond energy, which can be used to do work. 5.
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PS#3 - Sept 13 Answers - 1. Draw the structures of the...

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