Biology · Cell Cycle
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Replication of DNA occurs during:
- A
Interphase
- B
Prophase
- C
Metaphase
- D
Anaphase
DNA replication occurs during S-stage of interphase.
S phase(interphase) is the period during which DNA replication occurs.Interphase is a critical stage in the cell cycle that occurs before a cell divides. It is the longest phase and can be divided into three sub-stages: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
During G1, the cell grows in size, carries out its normal functions, and prepares for DNA replication. Once it reaches a certain checkpoint, it enters the S phase. In the S phase, DNA replication takes place, resulting in the synthesis of identical copies of the cell's genetic material.
After DNA replication, the cell enters the G2 phase. In this stage, the cell continues to grow, prepares for cell division, and checks for any errors in the replicated DNA. If everything is in order, the cell is ready to proceed to the next stage, which is cell division (mitosis or meiosis).
Overall, interphase is crucial for ensuring proper growth, duplication of genetic material, and readiness for cell division, playing a significant role in the cell's life cycle.
During prophase chromosomes condense, nucleolus disappears, nuclear envelope disintegrates into vesicles, centrioles move to opposite poles and mitotic spindle forms as microtubules are assembled.
In metaphase, chromosomes get lined up at the metaphase plate.
In anaphase, the sister chromatids separate from each other and are pulled towards opposite ends of the cell.
Tagged under Biology · Cell Cycle · 2014