last year exam 1 - Biology 150 Fall 2008 First Exam Wilson...

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Biology 150 Fall, 2008 First Exam Wilson Form 1 Part I: Give the single BEST answer to each question (2.5 points each). Use the answer sheet to record your answer. 1. The most recent common ancestor of chimps and humans lived about how many years ago (it is the time that the Homo line split from other primates, not the time of the first Homo sapiens )? a. 6,000 b. 220,000 c. 6 x 10 6 d. 2 x 10 9 e. 3.5 x 10 9 2. An ion with a PLUS ONE charge has the following electronic structure: 1s 2 2s 2 2p 6 3s 2 3p 3 . It is an ion of: (REMINDER: there is a periodic table on the wall) 3. How many different versions (enantiomers) are there for: 4. Consider a large deck of cards, each with a letter on one side and a number on the other. Given the hypothesis: ONLY IF “A” is on one side, THEN “4” is on the other . Turning over which of the following cards would be a GOOD test (think about “only if” and falsifiability)? 5. Which of the following is NOT a possible stable molecule, given the rules of bond numbers for different kinds of atoms? 6. Which of the following shows a carboxyl (functional) group? 7. Dehydration, or condensation, synthesis involves: a. the splitting of a water molecule b. the formation of a water molecule c. breaking an amino acid from a polypeptide chain d. breaking a nucleotide from a nucleic acid chain e. both c and d, above 8. Which of the following is a nucleoside?
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