Question

The reappearance of nuclear membrane and nucleolus along with thinning and elongation in chromosomes are diagnostic characters for the phase
A. Anaphase
B. Metaphase
C. Interphase
D. Telophase

Answer 1

The cell divides to replace the old cells, to replace the damaged cells, to repair. The cell division takes place in two major steps – interphase and mitotic phase. The interphase consists of G1, S, and G2 phases. The mitotic phase consists of 4 major phases – prophase, metaphase, anaphase, and telophase.

Complete answer: The reappearance of nuclear membrane & nucleolus along with thinning and elongation in chromosomes are distinguished characters for the telophase.
At this phase of the cell cycle, the polar microtubules continue to grow and it helps to elongate the cell size.
A new nuclear envelope is formed by using the membrane vesicles of the old nuclear envelope of the parent cell. Each set of separated daughter cells have a new nuclear membrane with chromosomes and the nucleolus.

So, the correct answer is option D. Telophase.

Note: The major events that take place during cell division:
In the prophase, the disappearance of the nuclear membrane and nucleolus occurs. The chromosomes condense and centrioles start dividing.
In the metaphase, the centrioles move to the opposite poles, and spindle fibres form. Chromosomes form chromatids and it attaches to the spindle fibers in the equatorial plane.
In the anaphase, the chromatids move towards opposite poles, cytokinesis or cytoplasm division starts to take place. The movement of chromatids in this phase is known as anaphasic movement.
In the telophase, the reappearance of the nuclear membrane, nucleolus occurs and the two daughter cells are formed.