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Total Questions : 109 | Page 7 of 11 pages
Question 61. A nuclear envelope forms around each set of sister chromatids in
  1.    prophase
  2.    telophase
  3.    metaphase
  4.    anaphase
 Discuss Question
Answer: Option B. -> telophase
Question 62. The cell cycle is controlled in most cells by
  1.    time (after a certain length of time the cell divides)
  2.    cell size (when the cell reaches a certain size, it divides)
  3.    a series of checkpoints
  4.    different cells exhibit different control strategies
 Discuss Question
Answer: Option D. -> different cells exhibit different control strategies
Question 63. Cells which no longer divide (such as certain specialized cells found in the human brain) remain in which phase of the cell cycle?
  1.    S phase
  2.    G0 Phase
  3.    Prophase
  4.    Gl Phase
 Discuss Question
Answer: Option B. -> G0 Phase
Question 64. DNA replication is controlled at which of the following checkpoint?
  1.    S
  2.    M
  3.    G1
  4.    G2
 Discuss Question
Answer: Option C. -> G1
Question 65. How many chromatids does a diploid body cell contain just prior to cell division?
  1.    46
  2.    92
  3.    69
  4.    23
 Discuss Question
Answer: Option B. -> 92
Question 66. Which of the following begins when pairs of sister chromatids align in the center of the cell?
  1.    Metaphase
  2.    Anaphase
  3.    Interphase
  4.    Prophase
 Discuss Question
Answer: Option A. -> Metaphase
Question 67. How many chromatids are there in a duplicated chromosome?
  1.    Two
  2.    Four
  3.    Three
  4.    One
 Discuss Question
Answer: Option A. -> Two
Question 68. The term homologous chromosomes
  1.    must be haploid
  2.    refers to replications of the same chromosome
  3.    means a pair of chromosomes of the same kind, such as sex chromosomes
  4.    is another name for sister chromatids
 Discuss Question
Answer: Option C. -> means a pair of chromosomes of the same kind, such as sex chromosomes
Question 69. At the center of the cell cycle control system is Cdk, a protein that
  1.    is phosphorylated to become active
  2.    is only active during mitosis
  3.    manufactures growth factors
  4.    binds to different cyclins
 Discuss Question
Answer: Option D. -> binds to different cyclins
Question 70. Each chromosome contains two chromatids by the end of the __________ phase in the life cycle of a human cell.
  1.    C
  2.    M
  3.    S
  4.    G2
 Discuss Question
Answer: Option C. -> S

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