The spireme stage of chromosomes is associated with:

In which phase of mitosis does the nuclear envelope disappear and spindle fibers become visible?

In which phase do the $Golgi$ complex and endoplasmic reticulum reform?

Explain $G_{2}$ phase in short.

Anaphase Promoting Complex $(APC)$ is a protein degradation machinery necessary for proper mitosis of animal cell. If $APC$ is defective in a human cell,which of the following is expected to occur?

Spindle fibers are primarily composed of which protein?