bq4_j03 - UC Extension Org/BioChem X402 Final exam,...

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UC Extension Org/BioChem X402 Final exam, 8/25/03. Name: (Please print) Total points: 23 General Some Figures are provided. You may use your (one) page of notes. Otherwise, “closed book”: no models, books, other notes, or periodic table. If a question isn’t clear, please ask me about it. In a multi-part question, if a difficulty with one part is keeping you from continuing, please see me. Some questions request a simple answer and an explanation. It’s the explanation that is important. No credit for answer without a requested explanation. When you are asked to mark something, please do so clearly, and label it clearly. 8 . (2 pts.) A buffer used in biochemistry labs is bicine. Bicine is N,N-bis(2- hydroxyethyl)glycine. (Bis is an alternative to di; bis is commonly used with complex groups.) Draw the structure of bicine. 8 . (2 pts.) Fish that live at temperatures below 0 ° C (such as in the Antarctic) have “anti-freeze proteins” to help prevent water from freezing in their systems. One type of anti-freeze proteins contains mainly the amino acids alanine and threonine. A sugar is attached to the side chain of one of these amino acids. The following parts refer to this anti-freeze protein, and make use of common X402 level chemistry. The parts are closely related.
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bq4_j03 - UC Extension Org/BioChem X402 Final exam,...

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