Q&A

where do the microtubules of the spindle originate during mitosis in animal cells?

In most animals and fungal cells, spindle microtubules nucleate from centrosomes or spindle pole bodies.

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    Where does the assembly of spindle microtubules begin in animal cells?

    The mitotic spindle begins to self-assemble in the cytoplasm during prophase. In animal cells, each of the replicated centrosomes nucleates its own array of microtubules, and the two sets of microtubules interact to form the mitotic spindle.

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    Where are microtubules found in animal and plant cells?

    A narrow, hollow tube-like structure found in the cytoplasm (the fluid inside a cell) of plant and animal cells. Microtubules help support the shape of a cell. They also help chromosomes move during cell division and help small structures called cell organelles to move inside the cell.

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    What phase does the spindle appear in animal cells?

    The spindle starts to form during the prophase of mitosis. The spindles start to attach to the Kinetochores of centromeres of sister chromatids during Prometaphase. The first and longest phase of mitosis is prophase.

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    Where does the assembly of spindle microtubules start?

    The mitotic spindle begins to self-assemble in the cytoplasm during prophase. In animal cells, each of the replicated centrosomes nucleates its own array of microtubules, and the two sets of microtubules interact to form the mitotic spindle.

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    What phase does the spindle appear in animal cells?

    The spindle starts to form during the prophase of mitosis. The spindles start to attach to the Kinetochores of centromeres of sister chromatids during Prometaphase. The first and longest phase of mitosis is prophase.

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    At what stage does the spindle appear?

    The mitotic spindle begins to self-assemble in the cytoplasm during prophase. In animal cells, each of the replicated centrosomes nucleates its own array of microtubules, and the two sets of microtubules interact to form the mitotic spindle.

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    What forms spindle in animal cells?

    At the beginning of nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle.

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    At what phase of mitosis does the spindle disappear in animal cells?

    Telophase. The spindle disappears, a nuclear membrane re-forms around each set of chromosomes, and a nucleolus reappears in each new nucleus. The chromosomes also start to decondense.

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    Is the mitotic spindle present in animal cells?

    Mitotic spindles are microtubule-based structures that separate chromosomes during mitosis. In most animals and fungal cells, spindle microtubules nucleate from centrosomes or spindle pole bodies.

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    Where is microtubules found in plants or animals?

    The microtubules in most cells extend outward from a microtubule-organizing center, in which the minus ends of microtubules are anchored. In animal cells, the major microtubule-organizing center is the centrosome, which is located adjacent to the nucleus near the center of interphase (nondividing) cells (Figure 11.39).

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    Where are microtubules found in plant cells?

    In plants, microtubules form superstructures before (the preprophase band), during (the spindle) and after (the phragmoplast) cell division. Plant microtubules also form dense and organized arrays at the periphery of the cell during interphase [1] and these arrays are known as cortical microtubules (CMTs).

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    Are microtubules found in plant cells animal cells or both?

    While both animal and plant cells have microtubule organizing centers (MTOCs), animal cells also have centrioles associated with the MTOC: a complex called the centrosome.

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    Is animal cell made up of microtubules?

    In animal cells, microtubules radiate outwards from an organelle in the center of the cell called a centrosome, which is a microtubule organizing center (MTOC). The cells of plants and fungi do not have centrosomes, and instead the nuclear envelope—the membrane surrounding the cell’s nucleus—is an MTOC.

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