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In: Biology

once M&C are complete, the new cells will be ? of interphase.

once M&C are complete, the new cells will be ? of interphase.

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Expert Solution

Thanks for asking the question.

I will answer the question with a detailed explanation

So, what exactly is Cell cycle: It is the series of growth and development steps a cell undergoes between its “birth”—formation by the division of a mother cell—and reproduction—division to make two new daughter cells.

The stages of the cell cycle include, To divide, a cell must complete several important tasks: it must grow, copy its genetic material (DNA), and physically split into two daughter cells. Cells perform these tasks in an organized, predictable series of steps that make up the cell cycle. The cell cycle is a cycle, rather than a linear pathway because, at the end of each go-round, the two daughter cells can start the exact same process over again from the beginning.

In eukaryotic cells or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase.

  • During interphase, the cell grows and makes a copy of its DNA.
  • During the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.   
  • In the Interphase,
  • G_11​start subscript, 1, end subscript phase. During G_11​start subscript, 1, end subscript phase, also called the first gap phase, the cell grows physically larger, copies organelles, and makes the molecular building blocks it will need in later steps.
  • S phase. In the S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome. The centrosomes help separate DNA during the M phase.

  • G2 ​phase. During the second gap phase or G2 phase, the cell grows more, makes proteins and organelles, and begins to reorganize its contents in preparation for mitosis. G2 phase ends when mitosis begins.
  • The G1, S, and G2 end phases together are known as interphase. The prefix inter- means between, reflecting that interphase takes place between one mitotic (M) phase and the next.

  • Now the M PHASE

  • During the mitotic (M) phase, the cell divides its copied DNA and cytoplasm to make two new cells. M phase involves two distinct division-related processes: mitosis and cytokinesis.

    In mitosis, the nuclear DNA of the cell condenses into visible chromosomes and is pulled apart by the mitotic spindle, a specialized structure made out of microtubules. Mitosis takes place in four stages: prophase (sometimes divided into early prophase and prometaphase), metaphase, anaphase, and telophase. You can learn more about these stages in the video on mitosis.

    In cytokinesis, the cytoplasm of the cell is split in two, making two new cells. Cytokinesis usually begins just as mitosis is ending, with a little overlap. Importantly, cytokinesis takes place differently in animal and plant cells.

  • In animals, cell division occurs when a band of cytoskeletal fibers called the contractile ring contracts inward and pinches the cell in two, a process called contractile cytokinesis. The indentation produced as the ring contracts inward is called the cleavage furrow. Animal cells can be pinched in two because they’re relatively soft and squishy.

  • Plant cells are much stiffer than animal cells; they’re surrounded by a rigid cell wall and have high internal pressure. Because of this, plant cells divide in two by building a new structure down the middle of the cell. This structure, known as the cell plate, is made up of plasma membrane and cell wall components delivered in vesicles, and it partitions the cell in two.

  • Cell cycle exit and G0 PHASE

    in one round of the cell cycle the two daughter cells, Some types of cells divide rapidly, and in these cases, the daughter cells may immediately undergo another round of cell division. For instance, many cell types in an early embryo divide rapidly, and so do cells in a tumor.

    Other types of cells divide slowly or not at all. These cells may exit the G_11​start subscript, 1, end subscript phase, and enter a resting state called the G0 phase. In G0 PHASE, a cell is not actively preparing to divide, it’s just doing its job. For instance, it might conduct signals as a neuron or store carbohydrates as a liver cell. G0 PHASE is a permanent state for some cells, while others may re-start division if they get the right signals.

  • Please do let me know if I can help you with anything.

    BEST OF LUCK

    Thank you


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