Cell Cycle and Mitosis Concepts

The video tutorial provides a comprehensive overview of cell division, detailing the process by which a parent cell divides into daughter cells. It explains the cell cycle, including the G1, S, G2, and M phases, and highlights the importance of checkpoints in regulating cell division. The tutorial also covers the stages of mitosis and the role of the G0 phase in cell quiescence.

What is the primary purpose of cell division?

• To reduce the number of chromosomes

• To create new organelles

• To produce two or more daughter cells

• To increase the size of the parent cell

How many chromosomes does a typical human cell contain?

• 23 chromosomes

• 44 chromosomes

• 22 chromosomes

• 46 chromosomes

Which phase of the cell cycle is known for its variability in duration?

• S phase

• G2 phase

• M phase

• G1 phase

What is the role of the G1 checkpoint in the cell cycle?

• To initiate DNA replication

• To condense DNA into chromosomes

• To ensure cell growth signals are present

• To separate sister chromatids

During which phase does DNA replication occur?

• S phase

• M phase

• G1 phase

• G2 phase

What is checked at the G2 checkpoint?

• Cell size

• Chromosome alignment

• Protein synthesis

• DNA damage and replication completeness

Which stage of mitosis involves the alignment of sister chromatids at the cell's center?

• Anaphase

• Metaphase

• Telophase

• Prophase

What happens during anaphase?

• Chromosomes condense

• Sister chromatids separate

• Nuclear membrane forms

• Cell growth occurs

What is the G0 phase also known as?

• Division phase

• Active phase

• Resting phase

• Growth phase

Which cells are most likely to remain in the G0 phase for their entire lifespan?

• Liver cells

• Intestinal lining cells

• Mature neurons

• Skin cells