Chapter 8


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Chapter 8

  1. 1. Mader's Concepts in Biology, First Edition Copyright © The McGraw-Hill Companies, InC) Permission required for reproduction or display. Sylvia S. Mader Chapter 8
  2. 2. Question 1 <ul><li>Cancer can best be described as: </li></ul><ul><li>A. foreign cells attacking an organ </li></ul><ul><li>B. uncontrolled cell division </li></ul><ul><li>C. cells from one organ invading another </li></ul><ul><li>D. cells which divide too slowly </li></ul><ul><li>E. cells which can no longer divide </li></ul>
  3. 3. Question 2 <ul><li>Which of the following statements is untrue of cancer? </li></ul><ul><li>A. cancer cells lose the specialization </li></ul><ul><li>B. cancer cells interfere with the normal action of other cells </li></ul><ul><li>C. cancer cells remain where they are formed </li></ul><ul><li>D. cancer is a genetic disorder </li></ul><ul><li>E. cancer cells divide uncontrollably </li></ul>
  4. 4. Question 3 <ul><li>Body cells are also known as germ cells. </li></ul><ul><li>A. true </li></ul><ul><li>B. false </li></ul>
  5. 5. Question 4 <ul><li>A scientist is studying reproduction in prokaryotes. Which type of reproduction would he or she be most likely be studying? </li></ul><ul><li>A. somatic reproduction </li></ul><ul><li>B. germ reproduction </li></ul><ul><li>C. sexual reproduction </li></ul><ul><li>D. gamete reproduction </li></ul><ul><li>E. asexual reproduction </li></ul>
  6. 6. Question 5 <ul><li>Sperm and egg are made from specialized cells called: </li></ul><ul><li>A. germ cells </li></ul><ul><li>B. asexual cells </li></ul><ul><li>C. somatic cells </li></ul><ul><li>D. binary cells </li></ul><ul><li>E. nucleoid cells </li></ul>
  7. 7. Question 6 <ul><li>Which of the following is not a reason why cell division is important in eukaryotes? </li></ul><ul><li>A. to repair damaged tissue </li></ul><ul><li>B. to replace old cells </li></ul><ul><li>C. to make extra copies of DNA to store for later use </li></ul><ul><li>D. to make new cells as the organism grows </li></ul><ul><li>E. to make new immune cells when the organism is sick </li></ul>
  8. 8. Question 7 <ul><li>A biologist is studying reproduction in bacteria. Which of the following terms best describes what he or she is studying? </li></ul><ul><li>A. germ fission </li></ul><ul><li>B. nucleoid fission </li></ul><ul><li>C. somatic fission </li></ul><ul><li>D. binary fission </li></ul><ul><li>E. gamete fission </li></ul>
  9. 9. Question 8 <ul><li>The greatest amount of day-to-day variation is produced by the process(es) of: </li></ul><ul><li>A. mitosis </li></ul><ul><li>B. meiosis </li></ul><ul><li>C. crossing-over </li></ul><ul><li>D. mutations and the regular cell cycle </li></ul><ul><li>E. meiosis and crossing over </li></ul>
  10. 10. Question 9 <ul><li>Crossing-over occurs during which of the following phases? </li></ul><ul><li>A. metaphase I </li></ul><ul><li>B. metaphase II </li></ul><ul><li>C. prophase I </li></ul><ul><li>D. prophase II </li></ul><ul><li>E. anaphase I </li></ul>
  11. 11. Question 10 <ul><li>The fusion of sperm and egg is called synapsis. </li></ul><ul><li>A. true </li></ul><ul><li>B. false </li></ul>
  12. 12. Question 11 <ul><li>During which stage do homologous chromosomes move away from each other? </li></ul><ul><li>A. prophase </li></ul><ul><li>B. anaphase I </li></ul><ul><li>C. anaphase II </li></ul><ul><li>D. metaphase I </li></ul><ul><li>E. metaphase II </li></ul>
  13. 13. Question 12 <ul><li>The second meiotic division is essentially a mitotic division except for the fact that the cells produced are: </li></ul><ul><li>A. haploid </li></ul><ul><li>B. diploid </li></ul><ul><li>C. polyploidy </li></ul><ul><li>D. autosomal </li></ul><ul><li>E. somatic </li></ul>
  14. 14. Question 13 <ul><li>Gametes and spores: </li></ul><ul><li>A. are both produced by animals </li></ul><ul><li>B. are autosomal </li></ul><ul><li>C. are haploid </li></ul><ul><li>D. are diploid </li></ul><ul><li>E. join in fertilization </li></ul>
  15. 15. Question 14 <ul><li>In the cell cycle the &quot;S&quot; stands for: </li></ul><ul><li>A. somatic </li></ul><ul><li>B. sexual </li></ul><ul><li>C. synthesis </li></ul><ul><li>D. sister </li></ul><ul><li>E. synapsis </li></ul>
  16. 16. Question 15 <ul><li>A biologist is studying the relaxed form of a chromosome. He or she would be studying which of the following? </li></ul><ul><li>A. chromatin </li></ul><ul><li>B. chromatids </li></ul><ul><li>C. centromeres </li></ul><ul><li>D. centrosomes </li></ul><ul><li>E. cytokinesis </li></ul>
  17. 17. Question 16 <ul><li>If the total number of chromosomes is six, then after mitosis there will be: </li></ul><ul><li>A. two chromosomes in each daughter cell, one from each parent </li></ul><ul><li>B. three chromosomes in each cell </li></ul><ul><li>C. 12 chromosomes in each cell </li></ul><ul><li>D. six chromosomes in each daughter cell </li></ul><ul><li>E. three chromosomes in one daughter cell and six chromosomes in the other cell </li></ul>
  18. 18. Question 17 <ul><li>Which is not a correct association? </li></ul><ul><li>A. cytokinesis-division of the cytoplasm </li></ul><ul><li>B. centromere-point at which sister chromatids remain attached </li></ul><ul><li>C. somatic-cells of the body not involved in gamete production and undergo mitosis </li></ul><ul><li>D. sister chromatids-two identical chromosome arms still attached at the centromere </li></ul><ul><li>E. mitosis-when a cell duplicates and then divides twice to half the chromosome number </li></ul>
  19. 19. Question 18 <ul><li>Which of the following is not the correct association? </li></ul><ul><li>A. somatic cells-diploid </li></ul><ul><li>B. somatic cells-haploid </li></ul><ul><li>C. one parent cell-two daughter cells </li></ul><ul><li>D. gamete cells-haploid </li></ul><ul><li>E. body cells-diploid </li></ul>
  20. 20. Question 19 <ul><li>If an organism has 50 chromosomes in its somatic cells, which of the following would be haploid? </li></ul><ul><li>A. 50 chromosomes </li></ul><ul><li>B. 50 pairs of chromosomes </li></ul><ul><li>C. 25 chromosomes </li></ul><ul><li>D. 25 pairs of chromosomes </li></ul><ul><li>E. 100 chromosomes </li></ul>
  21. 21. Question 20 <ul><li>During _______________, the nuclear envelope disappears, and the chromosomes become distinct. </li></ul><ul><li>A. interphase </li></ul><ul><li>B. prophase </li></ul><ul><li>C. metaphase </li></ul><ul><li>D. anaphase </li></ul><ul><li>E. telophase </li></ul>