NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following describes what takes place in the cell during cytokinesis?
A
Chromosomes pull apart to opposite ends of the cell.
B
Chromosomes line up along the equator of the cell.
C
The cytoplasm is cut, forming two distinct cells.
D
The nuclear membrane breaks down and disappears and chromatin condenses into chromosomes.
Explanation: 

Detailed explanation-1: -During the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.

Detailed explanation-2: -During cytokinesis, the cytoplasm splits in two and the cell divides. Cytokinesis occurs somewhat differently in plant and animal cells, as shown in Figure below. In animal cells, the plasma membrane of the parent cell pinches inward along the cell’s equator until two daughter cells form.

Detailed explanation-3: -Usually the cell will divide after mitosis in a process called cytokinesis in which the cytoplasm is divided and two daughter cells are formed.

Detailed explanation-4: -The division of cytoplasm is termed as cytokinesis. It happens in the final stage of mitosis which is a form of asexual cellular division. Mitosis has four different stages known as prophase, metaphase, anaphase, and telophase.

Detailed explanation-5: -Cytokinesis takes place in four stages: initiation, contraction, membrane insertion and completion. The events occurring within these stages differ in animal and plant cells.

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