NTA Abhyas NEET2020BotanyCell Cycle and Cell DivisionPractice
Which character marks the beginning of the second phase of mitosis?
Options
- AAppearance of chromosome
- BInitiation of spindle
- CDisintegration of nuclear envelope
- DFormation of equatorial plate
Correct answer
C. Disintegration of nuclear envelope
Step-by-step solution
The nuclear membrane disintegrates at the end of prophase, and the disintegration of the nuclear membrane marks the beginning of metaphase. In metaphase, chromosome starts moving towards the centre of the cell and gets organized in one straight line to form metaphase plate. Spindle fibre attachés to the kinetochore of each chromosome from each pole.