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Cell would normally proceed to mitosis without interruption
- a)Once it has entered the S phase
- b)Once it has entered the G2 phase
- c)At any time during cell division activity
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Cell would normally proceed to mitosis without interruptiona)Once it h...
The availability of mitogen and energy rich compounds decide wheter G1 phase will be arrested (G0 phase) or undergo S-phase. This point is called check point or G1 cyclin or G1 point. Once the check point of G1-phase is crossed and cell has entered S-phase, cell cycle will go on further division till completion.
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Cell would normally proceed to mitosis without interruptiona)Once it h...
Explanation:
Cell division is a complex process that involves several distinct phases, including interphase, mitosis, and cytokinesis. Mitosis, specifically, is the process by which a cell's nucleus divides into two identical nuclei, each containing the same number of chromosomes as the parent cell.
During interphase, the cell prepares for division by undergoing three sub-phases: G1 (gap 1), S (synthesis), and G2 (gap 2). The G1 phase is a period of cell growth and normal metabolic activity. The S phase is when DNA replication occurs, resulting in the duplication of the cell's chromosomes. The G2 phase is another period of growth and preparation for mitosis.
Cell Cycle Phases:
- G1 Phase: Cell growth and normal metabolic activity.
- S Phase: DNA replication occurs, resulting in the duplication of chromosomes.
- G2 Phase: Growth and preparation for mitosis.
- Mitosis: Division of the cell's nucleus into two identical nuclei.
- Cytokinesis: Division of the cell's cytoplasm and organelles.
Answer:
The correct answer to the question is option 'A': Once it has entered the S phase.
Explanation:
During the S phase, DNA replication occurs, resulting in the formation of two identical copies of each chromosome. This replication ensures that each daughter cell produced during mitosis receives a complete set of genetic information. Once DNA replication is complete, the cell has all the necessary components to proceed with mitosis.
After the S phase, the cell enters the G2 phase, during which it continues to grow and prepare for mitosis. However, the cell does not immediately proceed to mitosis at this point. It must undergo further checks and preparations to ensure that all DNA is correctly replicated and undamaged.
The G2 phase is characterized by the synthesis of proteins and organelles required for cell division. It is also during this phase that the cell undergoes a final check to ensure that the DNA is free from errors or damage. If any issues are detected, the cell may undergo repair processes or undergo apoptosis (programmed cell death) to prevent the transmission of faulty DNA to daughter cells.
Therefore, it is only after the cell has completed the S phase and undergone the necessary checks and preparations during the G2 phase that it can proceed to mitosis.
Cell division is a complex process that involves several distinct phases, including interphase, mitosis, and cytokinesis. Mitosis, specifically, is the process by which a cell's nucleus divides into two identical nuclei, each containing the same number of chromosomes as the parent cell.
During interphase, the cell prepares for division by undergoing three sub-phases: G1 (gap 1), S (synthesis), and G2 (gap 2). The G1 phase is a period of cell growth and normal metabolic activity. The S phase is when DNA replication occurs, resulting in the duplication of the cell's chromosomes. The G2 phase is another period of growth and preparation for mitosis.
Cell Cycle Phases:
- G1 Phase: Cell growth and normal metabolic activity.
- S Phase: DNA replication occurs, resulting in the duplication of chromosomes.
- G2 Phase: Growth and preparation for mitosis.
- Mitosis: Division of the cell's nucleus into two identical nuclei.
- Cytokinesis: Division of the cell's cytoplasm and organelles.
Answer:
The correct answer to the question is option 'A': Once it has entered the S phase.
Explanation:
During the S phase, DNA replication occurs, resulting in the formation of two identical copies of each chromosome. This replication ensures that each daughter cell produced during mitosis receives a complete set of genetic information. Once DNA replication is complete, the cell has all the necessary components to proceed with mitosis.
After the S phase, the cell enters the G2 phase, during which it continues to grow and prepare for mitosis. However, the cell does not immediately proceed to mitosis at this point. It must undergo further checks and preparations to ensure that all DNA is correctly replicated and undamaged.
The G2 phase is characterized by the synthesis of proteins and organelles required for cell division. It is also during this phase that the cell undergoes a final check to ensure that the DNA is free from errors or damage. If any issues are detected, the cell may undergo repair processes or undergo apoptosis (programmed cell death) to prevent the transmission of faulty DNA to daughter cells.
Therefore, it is only after the cell has completed the S phase and undergone the necessary checks and preparations during the G2 phase that it can proceed to mitosis.
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