NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When does the following take place:Chromatids reach poles, chromosomes unwind, nucleus reforms, and cell membrane pinches in.
A
Telophase
B
Anaphase
C
Interphase
D
Cytokinesis
Explanation: 

Detailed explanation-1: -During anaphase, sister chromatids are separated at the centromere and are pulled towards opposite poles of the cell by the mitotic spindle. During telophase, chromosomes arrive at opposite poles and unwind (uncoil) into thin strands of DNA, the spindle fibers disappear, and the nuclear membrane reappears.

Detailed explanation-2: -Telophase and Cytokinesis Mitosis ends with telophase, or the stage at which the chromosomes reach the poles.

Detailed explanation-3: -During telophase, a nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm. The chromosomes begin to uncoil, which makes them diffuse and less compact.

Detailed explanation-4: -During telophase, the nuclear envelope reforms on the surface of the separated sister chromatids, which typically cluster in a dense mass near the spindle poles (Fig. 44.18).

Detailed explanation-5: -During telophase both sets of chromatids are surround by new nuclear membranes and chromosomes decondense into chromatin. Cytokinesis (the dividing of the cytoplasm into two cells) follows telophase.

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