1. Cell division in multicellular organisms is important for _____. A
Cell division in multicellular organisms is important for _____ A. growth B. repair C. both A and B
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2. Which best describes prokaryotes. A. unicellular bacteria B
Which best describes prokaryotes? A. unicellular bacteria B. prominent nucleus C. many chloroplasts D. all of the above
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3. Chromosomes are composed of _____. A. DNA only B. proteins only C
Chromosomes are composed of _____ A. DNA only B. proteins only C. DNA and proteins
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4. Prokaryotes' DNA is found in the _____. A. nucleoid B. nucleolus C
Prokaryotes' DNA is found in the _____ A. nucleoid B. nucleolus C. nucleus
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5. Prokaryotes reproduce _____. A. by binary fission B. sexually C
Prokaryotes reproduce _____ A. by binary fission B. sexually C. very slowly
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6. Which process ensures that each newly formed cell gets its own copy of the DNA? A. transcription B. replication C. cytokinesis
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7. The diploid number of chromosomes in humans is _____. A. 1 B. 20 C
The diploid number of chromosomes in humans is _____ A B C D. 78
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8. In a eukaryotic cell that is NOT undergoing division, the tangled mass of DNA and its associated proteins is known as _____ A. sister chromatids B. centromeres C. chromatin D. histones
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9. The division of cytoplasm is called _____. A. replication B
The division of cytoplasm is called _____ A. replication B. karyokinesis C. binary fission D. cytokinesis
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10. If a cell with 46 chromosomes undergoes mitosis, the daughter cells will have _____ chromosomes A B C. 92
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11. In many animals, only _____ are haploid cells. A. eggs B. sperm C
In many animals, only _____ are haploid cells A. eggs B. sperm C. both A and B
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12. The region where sister chromatids are attached to one another is called the _____ A. centromere B. spindle C. aster D. centriole
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13. During prophase, it is apparent that nuclear division is about to occur because _____ A. the chromatin has condensed B. the chromosomes are visible structures C. both A and B
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14. The _____ most likely provide(s) the material for spindle formation. A
The _____ most likely provide(s) the material for spindle formation A. nucleus B. cytoskeleton C. sister chromatids D. plasma membrane
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15. Which of the following distinguishes an animal cell from a plant cell A. centrioles B. spindle C. asters D. both A and C
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16. Which of the following is NOT associated with prophase. A
Which of the following is NOT associated with prophase? A. fragmentation of the nuclear envelope B. disappearance of the nucleolus C. separation of the sister chromatids D. visible chromosomes
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17. The first phase of nuclear division is called _____. A. telophase B
The first phase of nuclear division is called _____ A. telophase B. metaphase C. prophase D. interphase
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18. After _____ nuclear division is completed. A. prophase B. metaphase C
After _____ nuclear division is completed A. prophase B. metaphase C. telophase D. interphase
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19. Alignment of the chromosomes at the equator of the spindle is characteristic of _____ A. metaphase B. prophase C. anaphase D. telophase
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20. The nuclear envelopes re-form, chromosomes unwind back into chromatin, nucleoli reappear, and the spindle disappears during _____ A. prophase B. telophase C. metaphase D. anaphase
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21. During __________, the chromosomes attach to the spindle and begin to align at the metaphase plate of the spindle A. telophase B. prometaphase C. anaphase D. prophase
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22. The sister chromatids separate from each other during _____. A
The sister chromatids separate from each other during _____ A. prophase B. telophase C. anaphase D. metaphase
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23. The spindle begins to assemble during _____. A. prophase B
The spindle begins to assemble during _____ A. prophase B. prometaphase C. metaphase D. anaphase
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24. Meristem tissue is found in the __________ of a plant. A. root tips B
Meristem tissue is found in the __________ of a plant A. root tips B. shoot tips C. stems D. all of the above
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25. In plant cells, the vesicles which move along microtubules to the midpoint between the two daughter nuclei fuse to form a cell __________ A. membrane B. plate C. wall
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26. Daughter cells as a result of mitosis have a complete copy of _____. A
Daughter cells as a result of mitosis have a complete copy of _____ A. chromosomes B. genes C. both A and B
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27. The separation of the two daughter cells during animal cell division begins when the _____ forms A. cell wall B. spindle C. cleavage furrow D. cell plate
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28. The period of DNA replication in the cell cycle is called the _____. A
The period of DNA replication in the cell cycle is called the _____ A. M stage B. G1 stage C. S stage D. G2 stage
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29. Interphase consists of the __________ stages of cellular growth and division A. G1, G2 and M B. G1, S and G C. M, S, and G D. M, S and G1
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30. The enzyme that removes a phosphate group from ATP is called _____. A
The enzyme that removes a phosphate group from ATP is called _____ A. cyclin B. kinase C. lipase D. cellulose
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31. Movement of a cell through the various stages of the cell cycle appears to be controlled by _____ A. kinase B. growth factors C. cyclins D. all of the above
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32. The cell grows in size and the number of cellular organelles increases during the _____ stage of the cell cycle A. G B. S C. G D. M
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33. The length of the different stages of the cell cycle _____. A
The length of the different stages of the cell cycle _____ A. varies among species B. varies among different cells in the same individual C. both A and B
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34. When most cancers occur, _____ is absent or nonfunctional. A
When most cancers occur, _____ is absent or nonfunctional A. the p53 gene B. survivin C. angiogenesis
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35. Which of the following is/are (a) mutagenic carcinogen(s). A
Which of the following is/are (a) mutagenic carcinogen(s)? A. radiation B. tobacco smoke C. viruses D. all of the above
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36. Programmed cell death is known as _____. A. mitosis B. cytokinesis C
Programmed cell death is known as _____ A. mitosis B. cytokinesis C. apoptosis
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37. The p53 protein _____. A. inhibits repair enzymes B
The p53 protein _____ A. inhibits repair enzymes B. stops the cell cycle during repair C. inhibits apoptosis D. all of the above
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38. Which of the following characteristics is displayed by cancer cells. A
Which of the following characteristics is displayed by cancer cells? A. contact inhibition B. normal looking nuclei C. specialization D. chromosome mutations
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39. A disorganized, generally encapsulated mass that does not invade adjacent tissue is known as a _____ A. neoplasia B. benign tumor C. anaplasia
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40. Colon cancer may be prevented by _____. A. smoking B
Colon cancer may be prevented by _____ A. smoking B. high-fiber diets C. alcohol consumption D. hormone therapy
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41. New methods of cancer treatment prevent _____ which cuts off the supply of nutrients and oxygen to the tumor A. metastasis B. angiogenesis C. differentiation D. anaplasia
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42. About 87% of all lung cancer cases are related to _____. A
About 87% of all lung cancer cases are related to _____ A. radon exposure B. asbestos exposure C. smoking D. alcohol consumption
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