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Midterm2'07PracticeKey

Midterm2'07PracticeKey - BIS 101 Midterm 2 Practice Exam...

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BIS 101 Midterm 2 Practice Exam, R.L. Rodriguez, s2008 1 1. Shown below is a table of the actual percent nucleotide composition for 7 different species. Each row totals 100%. Some of the data is missing. Fill in the missing data based on your knowledge of Chargaff’s Rules. (10 pts.) 2. From the information provided in the percent nucleotide composition table, which of the following statements is true about Chargaff’s Rules. Circle the correct answer(s). (5 pts.) A. Chargaff’s Rules reflect the natural pairing between complementary bases in DNA. B. The [A] = [T] and the [C] = [G] C. The [A] + [G] = [C] + [T] D. The [A + G]/[C + T] = 1 E. Statement D does not apply to single stranded DNA F. All of the above G. None of the above 3. In the “Y” mode of DNA replication observed in linear chromosomes, the replication fork moves in one direction until it reaches the end of the dsDNA. Draw a diagram that shows the microtopology of the replication fork. Be sure to label the following features. (8 pts.) A. parental strands and their polarities B. the lagging strands and their polarities C. the leading strands and their polarities D. all Okazaki fragments.
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