Mitosis and Cell Division Concepts

The video tutorial explains cell division, focusing on mitosis and the cell cycle. Mitosis is detailed through its stages: prophase, prometaphase, metaphase, anaphase, and telophase. The cell cycle includes interphase stages G1, S, and G2. Cytokinesis follows mitosis, completing cell division. The process is crucial for growth, tissue maintenance, and cell replication.

Why is cell division essential for organisms?

• To grow, mature, and maintain tissues

• To eliminate old cells

• To decrease cell size

• To increase the number of chromosomes

What happens during prophase in mitosis?

• Sister chromatids separate

• DNA condenses into chromosomes

• Nuclear membranes reappear

• Chromosomes align at the cell center

During which stage do microtubules attach to chromosomes?

• Anaphase

• Metaphase

• Prometaphase

• Prophase

What is the primary event during the S phase of interphase?

• Nuclear membrane breakdown

• Chromosome alignment

• Cell growth

• DNA replication

What marks the beginning of prometaphase?

• Chromosomes condense

• Nuclear membrane breaks down

• Sister chromatids align

• Cell divides

What is the role of kinetochores during mitosis?

• To form the nuclear membrane

• To replicate DNA

• To attach microtubules to chromosomes

• To condense DNA

During which stage do sister chromatids separate?

• Anaphase

• Telophase

• Metaphase

• Prophase

What occurs during telophase?

• Chromosomes condense

• Nuclear membranes reappear

• Microtubules attach to kinetochores

• Cell growth resumes

What is the final step of cell division after mitosis?

• Prophase

• Cytokinesis

• Metaphase

• Anaphase

Which organelles are divided between the two new cells during cytokinesis?

• Nucleus and ribosomes

• Mitochondria, Golgi bodies, and rough ER

• Lysosomes and peroxisomes

• Chloroplasts and vacuoles