NEET 2004 Biology question

Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle :-

(1)Transcription from chromosomes and reassembly of the nuclear lamina
(2)Formation of the contractile ring and formation of the phragmoplast
(3)Formation of the contractile ring and transcription from chromosomes
(4)Decondensation from chromosomes and reassembly of the nuclear laminaCorrect

Answer: (4)

Solution

At telophase the chromosomes reach the poles and begin to decondense (uncoil) into chromatin; the nuclear lamina (lamins) is dephosphorylated and reassembles, and membrane vesicles then fuse around the chromatin to re-form the nuclear envelope, followed by re-appearance of the nucleolus. Thus decondensation of

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Question ID VK-089440