exllain the character of cytokinesis
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Answer:
Cytokinesis. Cytokinesis is the process by which a cell divides its cytoplasm to produce two daughter cells. ... The furrow created by this pinching process is also called the "cleavage furrow," as it is the site at which cleavage of one cell into two cells occurs. Cytokinesis consists of four major steps.
Answer:
Cytokinesis is the process by which a cell divides its cytoplasm to produce two daughter cells. As the final step in cell division after mitosis , cytokinesis is a carefully orchestrated process that signals the start of a new cellular generation.
Cytokinesis consists of four major steps. The first step is to define the position at which the contractile ring will form. The spindle, the structure responsible for segregating the chromosomes into what will become the daughter cells, also appears to be responsible for defining where the contractile ring forms.
The second step in cytokinesis is to assemble the actin filaments that form the contractile ring. Additional proteins , including the molecular motor myosin, which powers contraction, also assemble in this same domain.
The third step is the actual contraction of the contractile ring. In this step, the myosin motor, powered by adenosine triphosphate, moves the actin filaments past each other, much in the same way as myosin interacts with actin to power the contraction of muscle. This step also requires the removal of actin subunits to allow the ring to decrease in size. The final step, breaking and refusion of the plasma membrane, occurs once the ring has contracted
A colored scanning electron micrograph of a breast cancer cell dividing.
A colored scanning electron micrograph of a breast cancer cell dividing.
to its minimum size. This breaking and fusion finally separates the two daughter cells from each other.