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Asked by Rituparna Last Modified
Yes, DNA replication can occur without cell division. In fact, DNA replication often occurs independently of cell division in many cells, particularly during the S phase of the cell cycle when cells are preparing for division.
During the cell cycle, DNA replication precedes cell division (mitosis or meiosis), ensuring that each daughter cell receives a complete and identical copy of the genetic material. However, not all cells that undergo DNA replication immediately proceed to division.
For example:
Interphase: During interphase, which comprises the G1, S, and G2 phases of the cell cycle, cells undergo various growth and metabolic activities. The S phase specifically is dedicated to DNA replication, during which the DNA molecule is unwound and duplicated to form two identical sister chromatids. After DNA replication is complete, the cell may enter G2 phase, where it prepares for cell division. However, cells can also temporarily exit the cell cycle and enter a non-dividing state known as G0 phase, where they can remain metabolically active without undergoing division.
Specialized Cells: Many specialized cells in multicellular organisms, such as neurons and muscle cells, do not actively divide but still undergo DNA replication as part of their normal cellular processes. These cells may undergo DNA replication to repair damaged DNA, replace damaged or aged cells, or maintain cellular function.
Therefore, while DNA replication is closely linked to cell division in the context of the cell cycle, it can also occur independently of cell division in various cellular contexts and stages of development.
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