Question:

Which one of the following preceeds reformation of the nuclear envelope during M phase of the cell cycle

Updated On: Mar 28, 2024

  • Transcription from chromosomes and reassembly of the nuclear lamina

  • Formation of the contractile ring and formation of the phragmoplast

  • Formation of the contractile ring and transcription from chromosomes 

  • Decondensation from chromosomes and reassembly of the nuclear lamina 

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The Correct Option is B

Solution and Explanation

During the M phase, which is also referred to as the mitotic phase and encompasses cell division, the process of re-establishing the nuclear envelope occurs in a stage known as telophase. Specifically, during telophase, the nuclear membrane that had vanished in prophase is reconstructed. However, before this reconstruction takes place, the nucleus undergoes a reorganization process, involving the decondensation of chromosomes and the reassembly of the nuclear lamina.
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Concepts Used:

Cells

  • A device that converts chemical energy into electrical energy is called an electric cell. To an electric circuit, the battery provides the constant electromotive force.
  • Each cell comprises 2 half cells which are connected in series by a conductive electrolyte containing anions and cations:
    • One-half cell is made up of electrolyte and a negative electrode called an anion.
    • The other half cell is made up of electrolytes and a positive electrode called a cathode.
  • Redox reactions take place simultaneously.
  • While charging, cations are reduced at the cathode, and anions are oxidized at the anode.
  • Electrodes do not join each other as they are electrically connected by the electrolyte.