Fall%20%2700 - CH 369-Exam 2 October 17, 2000 1. 5 pts_ 2....

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CH 369—Exam 2 October 17, 2000 NAME__________________________ SS#_____________________________ 1. 5 pts_______ 2. 10 pts_______ 3. 8 pts_______ 4. EXTRA CREDIT _______ 3 pts 5. 5 pts_______ 6. 6 pts_______ 7. OMIT 8. 6 pts_______ 9. 11 pts_______ 10. 6 pts_______ 11. 10 pts______ 12. 5 pts______ 13. 7 pts______ 14. OMIT 15. 5 pts______ 16. 10 pts______ 17. OMIT 18. 6 pts______ TOTAL ________________ OMIT QUESTIONS 7, 14, 17 Question 4 is now extra credit for 3 pts. Corrections 6b. ….mRNA is unstable 8a. ….composed of two…. . 9. Briefly explain 12c. …contains two…. .
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1. (5 pts) The cell membranes of bacteria grown at 20 ° C tend to have a higher proportion of unsaturated fatty acids than the membranes of bacteria of the same species grown at 37 ° C. Suggest reason for this observation and how this relates to membrane fluidity. 2. (5 pts) Explain how potassium moves across a membrane. How does this differ from simple and facilitated diffusion? 3. (8 pts)What are the biological functions for: a. vitamin K b. vitamin D c. vitamin E d. vitamin A
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4. (5 pts) You have isolated a mutant bacteria in which you observe that the membrane is easily disrupted. You find that a membrane protein that is normally integral to the membrane is easily
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Fall%20%2700 - CH 369-Exam 2 October 17, 2000 1. 5 pts_ 2....

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