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Unformatted text preview: Midterm 2 Practice Exam 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 Chargaffs Rules. (10 pts.) 2. From the information provided in the percent nucleotide composition table, which of the following statements is true about Chargaffs Rules. Circle the correct answer(s). (5 pts.) A. Chargaffs 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 Organism A T C G Human 30.9 19.9 19.8 Chicken 28.8 29.2 21.7 Grasshopper 29.3 20.5 20.7 Sea Urchin 32.8 32.1 17.7 Wheat 27.0 22.5 Yeast 31.5 32.5 E. Coli E....
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This note was uploaded on 12/18/2009 for the course BIS 52191 taught by Professor Marksanders during the Spring '09 term at UC Davis.
- Spring '09