Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle [CBSE PMT 2004]
A) Formation of the contractile ring, and formation of the phragmoplast
B) Formation of the contractile ring, and transcription from chromosomes
C) Decondensation from chromosomes, and reassembly of the nuclear lamine
D) Transcription from chromosomes, and ressembly of the nuclear lamina
Answers
Here is your answer
Formation of the contractile ring,and formation of the phragmmoplast.
Hope it would help you
Thanks dear
Answer:
(c) "Decondensation from chromosomes" and "reassembly of the nuclear lamina" is the right answer.
Explanation:
It is because, at the telophase stage, nuclear membrane related to the surface of 'individual chromosomes' come together to reform the nuclear membranes, which is 'clusters' of chromosomes that are partially enclosed before coalescing to refine the complete nuclear envelope.
During this process, the nuclear pores reassemble and the dephosphorylate again to form the nuclear lamina.
One among the lamina proteins is with the nuclear membrane fragments throughout the process of mitosis and may help in nuclear reassembly.
When the nucleus reforms, the chromosome decondense, and RNA synthesis will stop causing the nucleolus to again appear.