Answer:
Interphase is not a part of mitosis - it is a part of the cell cycle. Interphase and mitosis are separate events, but mitosis depends on interphase. In the three stages of Interphase (G1, S, G2) the cell is enlarging and synthesising both the DNA within the nucleus as well as organelles. There needs to be double of almost everything within the cell, because after cytokinesis takes place the two daughter cells must be able to function independently.
Answer:
Interphase is not a part of mitosis - it is a part of the cell cycle. Interphase and mitosis are separate events, but mitosis depends on interphase. In the three stages of Interphase (G1, S, G2) the cell is enlarging and synthesising both the DNA within the nucleus as well as organelles. There needs to be double of almost everything within the cell, because after cytokinesis takes place the two daughter cells must be able to function independently.
Scientists have theorised that there are certain 'checkpoints' that a cell must meet during interphase in order to undergo mitosis. After each Gap stage the cell 'checks' that it is large enough and has the right materials (proteins, vitamins, etc.) to progress to the next stage. This is especially important for the stage of DNA synthesis. If we assume that this 'checkpoint' theory is correct - which it would seem so, because how else would a cell regulate when it is time to enter mitosis? - then without interphase mitosis would not occur.
Bottom line is that in order for a cell to undergo mitosis, it must first undergo interphase. (Interphase is actually one of the most important stages of the cell cycle, and the name suggests it is unimportant - frustrates me to no end...)
Explanation:
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