Practice Exam 3.2

Practice Exam 3.2 - 1 Which of the molecules pictured on...

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1. Which of the molecules pictured on the right (A-E) is most commonly used as energy currency by cells? A. 2. Which will naturally be found in DNA? 3. Which ones are classified as pyrimidines? B. 4. Which molecule does not contain sufficient energy within its structure to be able to incorporate itself into a growing nucleic acid chain? 5. Incorporation of which of these monomers will result in termination of a growing chain? C. 6. Explain why G:C rich regions of DNA are more often difficult to separate. D. 7. The rare imino form of cytosine pairs with which nucleotide to create a point mutation? A. Adenine B. Guanine C. Thymine E. D. Uracil
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E. 5-bromouracil 8. In the laboratory you’ve identified a novel inhibitor telomerase. In testing this small compound and potential drug, you find that it inhibits cell division of cancerous tissue culture cells. Moreover, you’ve determined it has possible wider spectrum activity because it inhibits cell division in yeast cells by binding to the telomerase in yeast. Thinking it might have wider anti-microbial effects, your adviser suggests you test it on Escherichia coli to see if can inhibit the growth of bacteria. Why is this a silly experiment? 9. Explain why DNA replication is semi-conservative. 10. DNA polymerase catalyzes the synthesis of new strands of DNA. To do so, the enzyme requires three things. A DNA __________________________________ in the form a complementary strand is needed. 11. The enzyme primase synthesizes a necessary RNA ____________________ which is the starting point for DNA
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Practice Exam 3.2 - 1 Which of the molecules pictured on...

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