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Questions and Answers
During which phase does the actual cell division or mitosis occur?
During which phase does the actual cell division or mitosis occur?
- G1 phase
- Interphase
- G2 phase
- M Phase (correct)
Which phase corresponds to the interval between mitosis and initiation of DNA replication?
Which phase corresponds to the interval between mitosis and initiation of DNA replication?
- G2 phase
- M Phase
- G1 phase (correct)
- S phase
What is the duration of the cell cycle for human cells in culture?
What is the duration of the cell cycle for human cells in culture?
- 1 hour
- 90 minutes
- 24 hours (correct)
- 48 hours
Which phase is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication?
Which phase is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication?
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What percentage of the duration of the cell cycle does the interphase last for in human cells?
What percentage of the duration of the cell cycle does the interphase last for in human cells?
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Study Notes
Cell Cycle Phases
- Mitosis occurs during the M phase, which is the stage of actual cell division.
- The interval between mitosis and the initiation of DNA replication is known as the G1 phase or Gap 1 phase.
Duration of Cell Cycle
- The average duration of the cell cycle for human cells in culture is approximately 24 hours.
Preparation for Division
- The time during which the cell prepares for division, including cell growth and DNA replication, is referred to as the S phase or Synthesis phase.
Interphase Duration
- Interphase, which consists of G1, S, and G2 phases, lasts for about 90% of the duration of the cell cycle in human cells.
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