Question

Which one of the following precedes reformation
of the nuclear envelope during M phase of the
cell cycle ?
(a) Decondensation from chromosomes, and
reassembly of the nuclear lamina
(b) Transcription from chromosomes, and
reassembly of the nuclear lamina
(c) Formation of the contractile ring, and
formation of the phragmoplast
(d) Formation of the contractile ring, and
transcription from chromosomes

Answer 1

Answer:

After anaphase, when the chromatids have moved towards the opposite poles, furrowing starts in an animal cell to separate the two cells. Before the nuclear membrane reappears, the chromatids decondense and acquire back their chromosome original state and reassemble themselves. After that, the nuclear membrane is developed to enclose the chromatin material and separate it from the cytoplasm. Since the cell division is in progress, the transcription process cannot take place.

So, the correct option is 'decondensation of chromosomes and reassembly'.