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# Exam3-key - BIO315H Exam 3 Name_KEY Exam 3 13 November 2009...

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Exam 3 13 November 2009 Instructions: Do not open the exam until told to do so. Count to be certain that there are 7 different pages, including this cover sheet. Write your name at the top of every page. Please keep your answers brief. Often, I am only looking for a few words. Pace yourselves. Move quickly, you have 55 minutes. In the mean time, for fun : Twice six are eight of us, Six are but three of us, Nine are but four of us, What can we possibly be? Would you know more of us? I'll tell you more of us. Twelve are but six of us, Five are but four of us, now do you see? Letters A man eats breakfast at his camp, then travels due south. After going 10 miles in a straight line he stops for lunch. Then he sets out again due south. After going 10 miles in a straight line he finds himself back at camp. Where is he? 5 miles from the south pole. If that is too easy, I once sailed true north 60 miles from port, then west 60 miles then true south 60 miles; and then east 60 miles... arriving back at home port. The next day I sailed 30 miles on each leg, but did not arrive back home. Where was I relative to my home port at the end of the four leg journey? to the east BIO315H Exam 3 Name:___________________ KEY ________________________ relax. remain calm. eat more chocolate. breathe. you are getting sleepy .....

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Write the best answer that you can for each question. However, brevity is a virtue. The basics: 1) 29% of the bases in the genome of an organism are one of the purines. What percentage would be the other purine? Show the relative percentages of all the different bases (2 points) Given: Purine 1 = 29% Pyrimidine 1 = 29%; Pyrimidine 2 = 21%; Purine 2 = 21% 2) You have found an alien probe. Inside the probe is a message that seems to be informing you about the genetic makeup of their species. It looks like this:  ...  ... The file is huge– billions and billions of characters, but you manage to count all the ʻ s and find that they comprise 16% of the characters.
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Exam3-key - BIO315H Exam 3 Name_KEY Exam 3 13 November 2009...

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