NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL CYCLE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which phase of mitosis do chromosomes pull apart to opposite ends?

A	metaphase
B	anaphase
C	interphase
D	telophase

Explanation:

Detailed explanation-1: -During anaphase (b), the sister chromatids are pulled apart and move toward opposite poles of the cell.

Detailed explanation-2: -Anaphase I: In anaphase I, the attachment of the spindle fibers is complete. The homologous chromosomes are pulled apart and move towards opposite ends of the cell.

Detailed explanation-3: -During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle.

Detailed explanation-4: -Anaphase I begins when homologous chromosomes separate. The nuclear envelope reforms and nucleoli reappear. The chromosomes coil up, the nuclear membrane begins to disintegrate, and the centrosomes begin moving apart. Spindle fibers form and sister chromatids align to the equator of the cell.

Detailed explanation-5: -Answer and Explanation: The two phases of mitosis that are essentially opposite in terms of changes in the nucleus are prophase (the first stage) and telophase (the last phase).

There is 1 question to complete.