Understanding Mitosis and the Cell Cycle

What are the main phases of the cell cycle?

• Cytokinesis and Interphase

• Prophase and Telophase

• Interphase (G1, S, G2) and M phase (Mitosis)

• G1 and G0 phase

Describe the G1 phase and its significance.

• The G1 phase is the first stage of interphase where the cell grows, synthesizes proteins, and prepares for DNA replication, ensuring readiness for the next phase.

• The G1 phase is the final stage of mitosis where chromosomes separate.

• The G1 phase is a period of DNA replication and cell division.

• The G1 phase is when the cell divides into two daughter cells.

What occurs during the S phase of the cell cycle?

• Cell division occurs.

• Chromosome separation happens.

• DNA replication occurs.

• Protein synthesis takes place.

List the stages of mitosis in order.

• Prophase, Anaphase, Metaphase, Telophase

• Prophase, Metaphase, Telophase, Cytokinesis

• Interphase, Prophase, Anaphase, Telophase

• Prophase, Metaphase, Anaphase, Telophase

What is the role of checkpoints in the cell cycle?

• Checkpoints speed up cell division.

• Checkpoints are responsible for nutrient absorption.

• Checkpoints ensure proper cell cycle progression and prevent errors.

• Checkpoints are only active during DNA replication.

What happens to the cell's DNA during the S phase?

• The cell's DNA is condensed into chromosomes for division.

• The cell's DNA is destroyed, leading to cell death.

• The cell's DNA undergoes mutation, altering its structure.

• The cell's DNA is replicated, resulting in two identical sets of chromosomes.

Explain the differences between mitosis and cytokinesis.

• Mitosis is nuclear division; cytokinesis is the division of the cytoplasm.

• Mitosis occurs only in plant cells; cytokinesis occurs in animal cells.

• Cytokinesis is the process of DNA replication; mitosis is cell growth.

• Mitosis and cytokinesis are the same process occurring simultaneously.

Describe the events that take place during prophase.

• Chromatin condenses into chromosomes, nuclear envelope breaks down, spindle forms, and nucleolus disappears.

• Spindle fibers dissolve and the nucleolus reappears.

• The nuclear envelope thickens and becomes more visible.

• Chromosomes are formed from ribosomes.

What happens during metaphase?

• the duplicated chromosomes line up in the middle of the cell.

• the sister chromatids get pulled apart

• two nuclear membranes form in the cell

• the DNA condenses into chromosomes

Which phase of the cell cycle is shown?

• telophase

• prophase

• anaphase

• metaphase