Quiz 11 - E. The percentage of DNA that is compacted...

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Quiz #11 1. If you added BrdU to growing bacteria, which of the following is most likely? A. It would kill the cells because BrdU only works with eukaryotic cells B. All of the newly synthesized DNA would have BrdU in it instead of thymidine (T) C. Some double-stranded DNA would be made up of all BrdU (no T) in the first generation D. One chromatid would stain dark and one would stain light after the first generation E. All of the bacterial RNA would have BrdU in it 2. In the experiments described in BIO201B, separation of prokaryotic 14 N DNA from 15 N DNA was done by: A. Autoradiography B. Separating chromatids C. Differential centrifugation D. Polyacrylamide gel electrophoresis E. Density gradient centrifugation 3. There are changes in human DNA during the cell cycle. However, which of the following does not change during the cell cycle? A. Mass of DNA or amount of DNA (x) B. Number of base pairs (size of DNA) (c) C. Number of copies of the genome (Ploidy) (n) D. The number of pieces of chromatin
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Unformatted text preview: E. The percentage of DNA that is compacted (condensed) 4. When we used radioactive ( 3 H thymidine) incorporation to estimate the length of S-phase I showed a figure in class. What was on the Y-axis? A. Time after addition of 3 H thymidine B. Amount of 3 H thymidine in mitotic cells C. Percent of mitotic cells that were radioactive D. Number of radioactive cells that were in mitosis E. Percentage of unlabeled mitoses 5. How can you tell if a soluble factor from an S-phase cell stimulates a G1 phase liver cell to proceed into S-phase after microinjection of S-phase cytoplasm into that G1 cell? A. The cell would go from 1n1x1c to 2n2x2c B. There would be a large increase in the DNA content of the nucleus C. The cell would start to divide the DNA it has in half D. The chromatin would be seen starting to compact E. The cell would skip G2 and go right into cell division Answers 1. B 2. E 3. C 4. C 5. B...
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This note was uploaded on 09/30/2010 for the course BIO 201 taught by Professor Janicke during the Spring '08 term at SUNY Buffalo.

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