W7L14 - The cell cycle MCQ

• Interphase is which of the following combination of phases?

  1. G1 and G2
  2. G1, S and G2
  3. M and S
  4. M, G1 and G2
  5. M, G1, S and G2
  6. S and G2

  3
• Which of the following statements are true:

  1. During G1, the chromosomes divide.
  2. During G1, the chromosomes duplicate.
  3. During G2, the chromosomes divide.
  4. During G2, the chromosomes duplicate.
  5. During M-phase, the chromosomes divide.
  6. During M-phase, the chromosomes duplicate.
  7. During S-phase, the chromosomes divide.
  8. During S-phase, the chromosomes duplicate.

  5 and 8
• A kinase...

  1. dephosphorylates amino acids, typically cysteine, threonine and tyrosine.
  2. dephosphorylates amino acids, typically serine, threonine and tyrosine.
  3. phosphorylates amino acids, typically serine, cysteine and tyrosine.
  4. phosphorylates amino acids, typically serine, threonine and tyrosine.

  4
• Match the cell with the division time:

  • neurones
  • yeast
  • bacteria
  • frog embryo cells
  • human liver cells
  • skin fibroblasts in culture
  • gut lining (epithelial cells)
  • never
  • 90 mins
  • 20 mins
  • 30 mins
  • 1 year
  • 24 hours
  • 12 hours

  neurones - never

  yeast - 90 mins

  bacteria - 20 mins

  frog embryo cells - 30 mins

  human liver cells - 1 year

  skin fibroblasts in culture - 24 hours

  gut lining - 12 hours
• When a cell divides, the two resulting cells are called...

  1. daughter cells
  2. nephew cells
  3. niece cells
  4. sister cells
  5. son cells

  1
• Which phase of the cell cycle could be viewed as the holding phase in which most cells spend most of their time?

  1. G0
  2. G1
  3. G2
  4. G3
  5. M
  6. More than one of the above
  7. None of the above
  8. S

  1
• Which of the following are true:

  1. Cdk levels fluctuate during the cell cycle.
  2. Cdk levels remain constant during the cell cycle.
  3. The levels of the four cyclins fluctuate during the cell cycle.
  4. The levels of the four cyclins remain constant during the cell cycle.

  2 and 3
• The Mitosis-promoting factor (maturation-promoting factor; MPF) consists of which proteins?

  1. Cyclin-dependent kinase and Cyclin
  2. Cyclin-dependent kinase and protein kinase C
  3. Cyclin-independent kinase and Cyclin
  4. Cyclone-dependent kinase and Cyclone

  1
• Which phase of the cell cycle could be described as the dominant phase?

  1. G0
  2. G1
  3. G2
  4. G3
  5. M
  6. More than one of the above
  7. None of the above
  8. S

  5
• Which of the following will halt the cell cycle?

  1. DNA damage
  2. Damage-free DNA
  3. Favourable extra-cellular environment
  4. Fully replicated DNA
  5. Unfavourable extra-cellular environment
  6. Unreplicated DNA

  1, 5, 6