The video tutorial explains mitosis, the process of cell nucleus division, and its four stages: prophase, metaphase, anaphase, and telophase. Each stage is described in detail, highlighting key events such as chromosome condensation, alignment, separation, and the reformation of the nuclear membrane. The video concludes with a brief mention of cytokinesis, the final step in cell division.

What is the primary purpose of mitosis in cell division?

• To produce identical copies of cells

• To create genetic diversity

• To eliminate damaged cells

• To reduce the number of chromosomes

During prophase, what happens to the nuclear membrane?

• It duplicates

• It starts to dissolve

• It remains unchanged

• It becomes thicker

What structure forms during prophase to help move chromosomes?

• Centrioles

• Nucleolus

• Spindle fibers

• Cell wall

In metaphase, where do the chromosomes align?

• At the cell poles

• In the middle of the cell

• Near the nuclear membrane

• Randomly throughout the cell

What role do spindle fibers play during metaphase?

• They dissolve the nuclear membrane

• They attach to chromosomes and align them

• They duplicate the DNA

• They form the cell wall

What significant event occurs during anaphase?

• Sister chromatids separate

• Cell elongates

• Nuclear membrane reforms

• Chromosomes condense

During anaphase, where do the sister chromatids move?

• Towards the spindle fibers

• Towards the nuclear membrane

• Towards the cell poles

• Towards the cell center

What happens to the chromosomes during telophase?

• They duplicate

• They dissolve

• They align in the center

• They condense further

What begins to reform during telophase?

• Cell wall

• Nuclear membranes

• Centrioles

• Spindle fibers

What is the final outcome of telophase?

• Spindle fibers dissolve

• DNA is replicated

• Chromosomes condense

• Two new cells are formed