Exploring the Cell Cycle: AP Bio Unit 4 Review

The video tutorial reviews the cell cycle, focusing on phases like interphase and mitosis. It explains the importance of mitosis in growth and repair, and how checkpoints regulate the cycle. The role of cyclins and CDKs in cell cycle control is discussed, along with how dysregulation can lead to cancer. The video concludes with a review of experimental design concepts.

What are the main phases of the cell cycle discussed in the video?

• Metaphase and Telophase

• Anaphase and Cytokinesis

• Interphase and Prophase

• Interphase and Mitosis

During which phase does DNA replication occur?

• G2 phase

• M phase

• S phase

• G1 phase

What is the purpose of mitosis in multicellular organisms?

• To increase genetic diversity

• For growth and tissue repair

• To reduce chromosome number

• To initiate meiosis

What is cytokinesis?

• Division of the cell nucleus

• Attachment of chromosomes to spindle fibers

• Replication of DNA

• Division of the cell into two

What does the G0 phase represent in the cell cycle?

• DNA replication phase

• Active division phase

• Resting phase where the cell does not divide

• Phase where chromosomes condense

Which molecule regulates the cell cycle by changing concentration?

• CDK

• MPF

• RNA polymerase

• Cyclin

What is the role of MPF in the cell cycle?

• To degrade cyclin

• To initiate DNA replication

• To promote cell division

• To attach chromosomes to spindle fibers

How does unregulated cell cycle lead to cancer?

• By excessive production of MPF

• By reduced cyclin concentration

• By stopping all cell divisions

• By uncontrolled cell division

What is the function of p53 in the cell cycle?

• To replicate DNA

• To stop the cell cycle if there are errors

• To produce cyclin

• To initiate cytokinesis

What is a negative control in an experimental design?

• A trial with maximum changes

• A trial expected to produce results

• A trial without any changes

• A trial expected to produce no results