Question

Cytoskeletal elements play important roles in cell division. The mitotic spindle apparatus is made of ________ and pulls sister chromatids apart, whereas the contractile ring is made of ________ and required for the separation of daughter cells at the end of the mitotic phase of the cell cycle.

Answer 1

Answer:

Cytoskeletal elements play important roles in cell division. The mitotic spindle apparatus is made of "microtubules" and pulls sister chromatids apart, whereas the contractile ring is made of "actin filaments" and required for the separation of daughter cells at the end of the mitotic phase of the cell cycle.

Explanation:

The three chief organizational apparatuses of the cytoskeleton are microtubules (formed by tubulins), microfilaments (formed by actins) and intermediate filaments. All three apparatuses cooperate with each other non-covalently. The cytoskeleton is composed of protein filaments and is found throughout the inside of a eukaryotic cell. The cytosol is the main component of the cytoplasm, the fluid that fills the inside of the cell. The cytoplasm is everything in the cell except for the cytoskeleton and membrane-bound organelles.

Answer 2

The mitotic spindle apparatus is made of MICROTUBULLES and pulls sister chromatids apart, whereas the contractile ring is made of ACTIN MICROFILAMENTS.

• The three types of filaments of the cytoskeleton are microtubules, actin filaments, and intermediate filaments.

• These protein filaments reorganize during cell division in order to produce the separation of the parental cell into two daughter cells.

• The microtubules form the mitotic spindle that separates pairs of homologous chromosomes during anaphase, whereas actin filaments form the contractile ring involved in cytokinesis.

In conclusion, the mitotic spindle apparatus is made of MICROTUBULLES and pulls sister chromatids apart, whereas the contractile ring is made of ACTIN MICROFILAMENTS.

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