Cell Cycle and Mitosis Concepts

This virtual biology lecture covers the cell cycle and mitosis, focusing on the processes of cell division in both prokaryotic and eukaryotic cells. It explains the stages of the eukaryotic cell cycle, including interphase and the M phase, and details the steps of mitosis and cytokinesis. The lecture also discusses disruptions in the cell cycle that can lead to diseases like cancer, emphasizing the importance of accurate genetic information replication. The session concludes with a recap of the key points and encourages students to take notes and ask questions.

What is the primary purpose of the cell cycle in multicellular organisms?

• To produce energy

• To transport nutrients

• To facilitate growth and repair

• To eliminate waste

Which process do prokaryotic cells use to reproduce?

• Mitosis

• Meiosis

• Binary fission

• Budding

During which phase of interphase does DNA replication occur?

• M phase

• S phase

• G1 phase

• G2 phase

What is the role of spindle fibers during mitosis?

• To replicate DNA

• To condense chromatin

• To separate sister chromatids

• To form the nuclear membrane

Which stage of mitosis involves chromosomes aligning at the cell's equator?

• Metaphase

• Anaphase

• Prophase

• Telophase

What happens during cytokinesis?

• The nucleus divides

• The cell grows

• The cytoplasm divides

• DNA is replicated

What is the G0 phase in the cell cycle?

• A phase of rapid cell division

• A resting phase where cells do not divide

• A phase of cell death

• A phase of DNA replication

How do specialized cells in multicellular organisms arise?

• Through environmental changes

• Through random mutation

• Through differentiation

• Through binary fission

What can cause disruptions in the cell cycle leading to cancer?

• Proper DNA replication

• Environmental factors like radiation

• Balanced cell division

• Normal cell differentiation

What is a tumor in the context of cell cycle disruptions?

• A phase of the cell cycle

• A mass of abnormal cells

• A single abnormal cell

• A type of cell division