Biology 1: Chapter 7: Cell Division
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1. Which of the following statements is not generally true?
a. As an organism matures, it needs more cells.
b. As an organism matures, it needs different kinds of cells.
c. As an organism matures, it needs to replace the DNA in each of its cells.
d. As an organism matures, it needs to replace worn-out cells.
a. As an organism matures, it needs more cells.
b. As an organism matures, it needs different kinds of cells.
c. As an organism matures, it needs to replace the DNA in each of its cells.
d. As an organism matures, it needs to replace worn-out cells.
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c. As an organism matures, it needs to replace the DNA in each of its cells.
1. Which of the following statements is not generally true?
a. As an organism matures, it needs more cells.
b. As an organism matures, it needs different kinds of cells.
c. As an organism matures, it needs to replace the DNA in each of its cells.
d. As an organism matures, it needs to replace worn-out cells.
a. As an organism matures, it needs more cells.
b. As an organism matures, it needs different kinds of cells.
c. As an organism matures, it needs to replace the DNA in each of its cells.
d. As an organism matures, it needs to replace worn-out cells.
c. contain a set of DNA that is identical to that of the parent cell.
2. Some daughter cells are described as clones; for this description to be appropriate, the daughter cells must
a. show the same differentiation characteristics as the parent cell.
b. separate from one another and experience an independent existence.
c. contain a set of DNA that is identical to that of the parent cell.
d. have been produced by meiotic cell division.
a. show the same differentiation characteristics as the parent cell.
b. separate from one another and experience an independent existence.
c. contain a set of DNA that is identical to that of the parent cell.
d. have been produced by meiotic cell division.
a. Prokaryotes have a circular DNA molecule.
3. Which of the following choices states a correct reason why the process of cell division is different for prokaryotic than for eukaryotic cells?
a. Prokaryotes have a circular DNA molecule.
b. Prokaryotic cells do not undergo cell division.
c. Prokaryotic cells are larger than eukaryotic cells.
d. Prokaryotic DNA contains different bases from those in eukaryotic DNA.
a. Prokaryotes have a circular DNA molecule.
b. Prokaryotic cells do not undergo cell division.
c. Prokaryotic cells are larger than eukaryotic cells.
d. Prokaryotic DNA contains different bases from those in eukaryotic DNA.
a. mitosis.
4. A single cell grows into a multicellular organism by the process of
a. mitosis.
c. fertilization.
b. meiosis.
d. duplication.
a. mitosis.
c. fertilization.
b. meiosis.
d. duplication.
a. It is the process by which organisms grow and maintain their tissues.
5. Which of the following statements about cell division is correct?
a. It is the process by which organisms grow and maintain their tissues.
b. It is no longer necessary once an organism reaches maturity.
c. It occurs in two sequential stages in all cells: mitosis and meiosis.
d. It is the process by which fertilization occurs.
a. It is the process by which organisms grow and maintain their tissues.
b. It is no longer necessary once an organism reaches maturity.
c. It occurs in two sequential stages in all cells: mitosis and meiosis.
d. It is the process by which fertilization occurs.
b. A zygote consists of a single cell, whereas an embryo is multicellular.
6. What feature(s) distinguish an embryo from a zygote?
a. The cells of an embyro are diploid, whereas those of the zygote are haploid.
b. A zygote consists of a single cell, whereas an embryo is multicellular.
c. An embryo has differentiated to the extent that rudimentary organs are present, whereas a zygote's cells are still undifferentiated.
d. both a and c
a. The cells of an embyro are diploid, whereas those of the zygote are haploid.
b. A zygote consists of a single cell, whereas an embryo is multicellular.
c. An embryo has differentiated to the extent that rudimentary organs are present, whereas a zygote's cells are still undifferentiated.
d. both a and c
c. Both processes include DNA segregation.
7. The process of mitosis is thought to have evolved from binary fission. What similarities exist between these processes?
a. The DNA being separated is attached to a membrane during both processes.
b. Both processes involve the separation of more than one piece of DNA.
c. Both processes include DNA segregation.
d. DNA must be tightly packaged into chromosomes before either process can begin.
a. The DNA being separated is attached to a membrane during both processes.
b. Both processes involve the separation of more than one piece of DNA.
c. Both processes include DNA segregation.
d. DNA must be tightly packaged into chromosomes before either process can begin.
d. all of the above
8. In what way(s) does a human somatic cell differ from a human gamete?
a. Somatic cells are diploid (2n), whereas gametes are haploid (n).
b. Somatic cells are created by mitosis, whereas gametes are created by meiosis.
c. Somatic cells differentiate into at least 220 cell types, whereas only two types of gametes exist.
d. all of the above
a. Somatic cells are diploid (2n), whereas gametes are haploid (n).
b. Somatic cells are created by mitosis, whereas gametes are created by meiosis.
c. Somatic cells differentiate into at least 220 cell types, whereas only two types of gametes exist.
d. all of the above
d. all of the above
9. Sexual reproduction results in many benefits for a population, but not without some inconvenience; for example,
a. each participant must locate an appropriate mate.
b. the time required for sexual reproduction may mean that short-term opportunities for population growth are missed.
c. some genetic combinations may be disadvantageous and the effort invested in producing offspring wasted.
d. all of the above
a. each participant must locate an appropriate mate.
b. the time required for sexual reproduction may mean that short-term opportunities for population growth are missed.
c. some genetic combinations may be disadvantageous and the effort invested in producing offspring wasted.
d. all of the above
b. A, B, and C
10. The illustration below shows a summary of the events in the life cycle of a human. Which of the lettered transitions or events require mitosis?
a. all but F
c. D and E
b. A, B, and C
d. F only
a. all but F
c. D and E
b. A, B, and C
d. F only
b. A persistently cooling climate results in a significant increase in average winter snow depth.
Sexual and asexual reproduction can both offer distinct advantages under certain circumstances. In which of the following situations would asexual reproduction be disadvantageous?
a. Decomposers discover a dolphin carcass that had recently drifted to the ocean floor.
b. A persistently cooling climate results in a significant increase in average winter snow depth.
c. A cut breaches the defensive ability of the skin and infectious pathogens invade the injury.
d. Coastal currents, water temperature, nutrient concentrations, and light intensity temporarily combine to produce ideal growth conditions for marine phytoplankton.
a. Decomposers discover a dolphin carcass that had recently drifted to the ocean floor.
b. A persistently cooling climate results in a significant increase in average winter snow depth.
c. A cut breaches the defensive ability of the skin and infectious pathogens invade the injury.
d. Coastal currents, water temperature, nutrient concentrations, and light intensity temporarily combine to produce ideal growth conditions for marine phytoplankton.
c. cytokinesis plus mitosis or meiosis.
12. Cell division, the climax of the cell cycle, consists of
a. chromosome replication and separation.
b. the breakup of the nucleus at the metaphase plate.
c. cytokinesis plus mitosis or meiosis.
d. the formation of a new karyotype.
a. chromosome replication and separation.
b. the breakup of the nucleus at the metaphase plate.
c. cytokinesis plus mitosis or meiosis.
d. the formation of a new karyotype.
d. S, G1, and G2
13. Which set of symbols represents the stages of interphase?
a. G0, G1, and G2 c. G0, G1, and S
b. S1, S2, and G0
d. S, G1, and G2
a. G0, G1, and G2 c. G0, G1, and S
b. S1, S2, and G0
d. S, G1, and G2
a. duplicates its DNA.
14. During the S phase, the cell
a. duplicates its DNA.
b. grows in size to prepare for DNA synthesis.
c. completes its preparation for mitosis.
d. rests between divisions.
a. duplicates its DNA.
b. grows in size to prepare for DNA synthesis.
c. completes its preparation for mitosis.
d. rests between divisions.
c. an absence of preparation for DNA synthesis.
15. The G0 phase of the cell cycle is distinguished by
a. an active preparation for DNA synthesis.
b. a doubling of chromosomes.
c. an absence of preparation for DNA synthesis.
d. the appearance of a metaphase plate.
a. an active preparation for DNA synthesis.
b. a doubling of chromosomes.
c. an absence of preparation for DNA synthesis.
d. the appearance of a metaphase plate.