2010 Sp08 Exam 3A-Key

2010 Sp08 Exam 3A-Key - NAME_Signature_ BSC2010 Section 02...

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NAME_______________________Signature___________________________ BSC2010 – Section 02 March. 27 2008 Test # 3 - 100 pts . You are on your honor to neither give nor receive help with this exam. (One correct answer per question) 1. What is the name for the special region on a duplicated chromosome that holds the sister chromatids together? a. centrosome b. centromere c. desmosome d. spliceosome 2. Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in concentration during the cell cycle, are called a. ATPases b. Kinetochores c. Centrioles d. Cyclins 3. Starting with a single cell, a series of five cell divisions would produce how many cells? a. 8 b. 16 c. 32 d. 10 4. The correct sequence of steps in the M phase of the cell cycle is a. Prophase, prometaphase, metaphase, telophase, anaphase b. Prophase, prometaphase, metaphase, S-phase, anaphase, anaphase, telophase c. Prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis d. Prophase, prometaphase, telophase, metaphase, anaphase 5. Measurement of the DNA amount of a large number of cells showed a range of 3-6 picograms per nucleus. In which stage of the cell cycle was the nucleus with 6 picograms of DNA? a. G0 b. G1 c. S d. G2 6. The chromosomes are maximally condensed during: a. Metaphase b. Prophase c. Prometaphase d. G2 phase 7. The function of the M-phase checkpoint is to check if the cells is a. ready for DNA replication/synthesis b. done with DNA replication c. ready to separate the chromosomes d. ready to move from G0 to G1 8. The strands that make up DNA are antiparallel. This means that a. The twisting nature of DNA creates nonparallel strands b. The 5’ to 3’ direction of one stand runs counter to the 5’ to 3’ direction of the other strand c. One strand is positively charged and the other is negatively charged d. One strand contains only purines and the other contains only pyrimidines. 1
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NAME_______________________Signature___________________________ Figure 1 9. If you grew bacteria in medium containing “heavy” nitrogen ( 15 N) and then transferred them to medium containing 14 N. Which of the results in Figure 1 would be expected after one round of DNA replication? a. a b. b c. c d. d e. e Refer to the following list of proteins to answer questions 10-15: 1: helicase; 2: ligase; 3: 5’-3’ polymerase activity; 4: 5’-3’ exonuclease activity; 5: 3’-5’ exonuclease activity; 6: primase; 7: topoisomerase; 8: telomerase; 9: single-strand DNA binding protein
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This note was uploaded on 04/18/2008 for the course BIOLOGY BSC2010 taught by Professor Tang during the Spring '08 term at FSU.

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2010 Sp08 Exam 3A-Key - NAME_Signature_ BSC2010 Section 02...

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