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exam12002 - MCB 410 SPRING 2002 First Hour Exam February 8,...

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MCB 410 SPRING 2002 First Hour Exam February 8, 2002 1 (16pts ). Proteins are often made up of multiple distinct domains. A. (8pts) What is meant by a STRUCTURAL protein domain? Give two specific examples. (4pts for definition; 2pts for each example) B. (8pts) What is it about the structure of eukaryotic GENES that may have promoted the evolution of new PROTEINS that consist of multiple domains? 2. (20 pts) You are studying a new human protein. In order to learn how this protein may have evolved, you compare its sequence to homologous proteins in other organisms. Using the similarity or their protein sequences you construct an evolutionary tree showing how your protein may have evolved. This tree is shown below.
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2 continued. A (8pts). Explain what this tree tells you about the evolution of your protein. 2B. (6pts) What is most likely to have occurred to give rise to the branch labeled 1? 2C. (6pts) What is most likely to have occurred to give rise to the branch labeled 2? 3. (7 Pts) How do animal cells maintain membrane fluidity, and hence membrane function, in response to decreased temperature? 4. (24PTS)
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This note was uploaded on 11/02/2008 for the course MCB 410 taught by Professor Ward during the Spring '08 term at Arizona.

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exam12002 - MCB 410 SPRING 2002 First Hour Exam February 8,...

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