TEST BANK 4

TEST BANK 4 - Page 1 Fundamentals of Biology TEST BANK Ch....

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Page 1 Fundamentals of Biology TEST BANK Ch. 12, 13, 14 and 15 1) What is a chromatid? Figure 12.2 2) If the cell whose nuclear material is shown in Figure 12.2 continues toward completion of mitosis, which of the following events would occur next? 3) All of the following occur during prophase of mitosis in animal cells except 3) _______ A) the nucleolus can no longer be seen. B) the spindle is organized. C) chromosomes are duplicated. D) the centrioles move toward opposite poles. E) the nuclear envelope disappears. 4) How is the S phase of the cell cycle measured 5) Where do the microtubules of the spindle originate during mitosis in both plant and animal cells? 6) All of the following occur during mitosis except the 6) _______ A) formation of a spindle. B) condensing of chromosomes. C) uncoupling of chromatids at the centromere. D) disappearance of the nucleolus. E) synthesis of DNA. 7) How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in E E of the cell cycle? 8) Which of the following organisms does not reproduce cells by mitosis and cytokinesis? 8) _______ A) bacterium B) cockroach C) cow D) banana tree E) mushroom 9) Chromosomes first become visible during ________ of mitosis 10) What is the correct sequence of steps in the M phase of the cell cycle? 11) Imagine looking through a microscope at a squashed onion root tip. The chromosomes of many of the cells are plainly visible. In some cells, replicated chromosomes are aligned along the center (equator) of the cell. These particular cells are in which stage of mitosis? 12) What causes the decrease in the amount of cyclin at a specific point in the cell cycle?
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Page 2 13) A particular cyclin called cyclin E forms a complex with a cyclin-dependent kinase called Cdk 2. This complex is important for the progression of the cell from E E into the S phase of the cell cycle. Which of the following statements is correct ? 13) ______ A) The amount of Cdk 2 is greatest during E E . B) The amount of cyclin E is greatest during the S phase. C) The amount of Cdk 2 is greater during E E compared to the S phase. D) The amount of cyclin E is highest during E E . E) The activity of the cyclin E/Cdk 2 complex is highest during E E . 14) Which of the following is (are) true concerning cyclin-dependent kinase (Cdk)? 14) ______ A) Cdk is inactive, or "turned off," in the presence of cyclin. B) Cdk is an enzyme that attaches phosphate groups to other proteins. C) Cdk is present throughout the cell cycle. D) Both A and B are true. E) Both B and C are true. 15) Which of the following is true concerning cancer cells? 15) ______ A) They do not exhibit density-dependent inhibition when growing in culture. B) They are not subject to cell cycle controls.
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TEST BANK 4 - Page 1 Fundamentals of Biology TEST BANK Ch....

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