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Exam%203%20Bios%20100%20%20Spring%202010%20revised - Bios...

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Bios 100 Spring 2010 Exam 3 1. Which nucleic acid is translated to make a protein? A. mRNA B. rRNA C. DNA D. tRNA E. none of the above 2. What is meant by translocation? 3. Which of the following statements best defines the term operon? 4. What happens to the expression of the lacI gene if lactose is not available in the cell? 5. Which of the following terms describes the DNA–protein complexes that look like beads on a string? A. Chromatin B. 30-nanometer fiber C. Histones D. Nucleosome E. Operon
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6. Which regulatory DNA sequences might be located thousands of nucleotides away from the transcription start site of a gene? 7. Which molecules never cross the nuclear membrane? 8. In experiments to test whether a protein can enter the nucleus, why would proteins be labeled with fluorescent molecules? 9. Which term describes two recently replicated DNA strands that are joined together just before cell division? A. Centriole B. Centrosome C. Centromere D. Sister chromatids E. Synapsids
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