Question:

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

Updated On: Jul 13, 2024
  • Decondensation of chromosomes and reassembly of nuclear lamina
  • Transcription from chromosomes and reassembly of nuclear lamina
  • Formation of the contractile ring and formation of phragmoplast
  • Formation of the contractile ring and transcription from chromosomes
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The Correct Option is A

Solution and Explanation

M phase is known as mitotic phase and cell division occurs in this phase. The re-formation of the nuclear envelope during M-phase of the cell cycle takes place during telophase. The nuclear membrane which disappears during propahse reappears in the telophase. But before it is reformed the nucleus gets reorganised by decondensation from chromosome and reassembly of the nuclear lamina.
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Concepts Used:

Cell Cycle and Cell Division

Cell Cycle:

The sequence of events by which a cell copies itself synthesizes other constituents of the cell and eventually splits into two daughter cells is termed the cell cycle. The cell synthesizes all its constituents in a sequential pattern to make sure the proper division and distribution of components that occurs between the two daughter cells. Therefore, we can say that the cell cycle is the period of time between the development of new daughter cells and their further division.

Stages of Cell Cycle:

The cell cycle can be sub-divided into an additional category of Interphase. Meanwhile, the Interphase can be branched into 3 further stages, such as:

  1. G1 Phase - “Gap 1 Phase”
  2. S Phase - "Synthesis Phase"
  3. G2 Phase - "Gap 2 Phase"

Read More: Cell Cycle and Cell Division

Cell Division:

The division of the parent cells into two or more cells is called daughter cell, cell division takes place. In general, it occurs as a part of a larger cell cycle. All the cell reproduces by dividing into two, wherein each parental cell produces two daughter cells.

Stages of Cell Division:

Cell division can be widely divided into several sub-segments that result from Mitosis and Meiosis.

  1. Mitosis or (M Phase)
  2. Meiosis