Cell Cycle and DNA Replication Concepts

The video tutorial explains the cell cycle, a process by which cells grow and divide to replace worn-out or damaged cells. It covers the four main phases: G1, S, G2, and mitosis, detailing their roles in cell growth and division. The tutorial also discusses the implications of the cell cycle, such as cancer and aging, due to errors in DNA replication. Finally, it concludes with a summary and a preview of the next unit on genetics.

What is the primary purpose of the cell cycle?

• To produce food for the organism

• To replace worn-out or damaged cells

• To eliminate waste from the cell

• To create energy for the cell

During which phase of the cell cycle do cells grow and prepare for division?

• G2 phase

• Mitosis

• G1 phase

• S phase

What happens during the S phase of the cell cycle?

• Cells exit the cell cycle

• Cells divide into two identical cells

• Cells synthesize an identical copy of their DNA

• Cells grow and prepare for division

What is the role of centrosomes during mitosis?

• To synthesize DNA

• To pull DNA sets to opposite sides of the cell

• To grow the cell

• To dissolve the nuclear envelope

What is the G0 phase?

• A phase where cells prepare to divide

• A phase where cells divide into two

• A phase where cells perform normal functions without dividing

• A phase where cells synthesize DNA

What can result from cells failing to exit the cell cycle?

• Cancer

• Increased energy production

• Cell death

• Aging

Why don't cells always copy DNA perfectly?

• To create genetic diversity

• To speed up the cell cycle

• Because of errors in the replication process

• Due to environmental factors

What are some consequences of DNA replication errors over time?

• Enhanced muscle strength

• Aging and decreased organ effectiveness

• Improved organ function

• Increased cell growth

What are the main phases of the cell cycle?

• G1, G0, S, and mitosis

• G1, S, G0, and mitosis

• G0, S, G2, and mitosis

• G1, S, G2, and mitosis

What will the next unit focus on after the cell cycle?

• The process of mitosis

• The process of cytokinesis

• The structure and expression of DNA

• The phases of the cell cycle