Cell Division

What is the significance of the S phase in the cell cycle?

• It is the phase where the cell grows and prepares for division.

• It is when DNA replication occurs, resulting in the duplication of chromosomes.

• It is the phase where the cell undergoes mitosis.

• It is when the cell performs its normal functions and metabolism.

What occurs during metaphase in mitosis?

• Chromosomes replicate and prepare for division.

• Chromosomes align at the cell's equatorial plane, and spindle fibers attach to the centromeres.

• Chromosomes are pulled apart to opposite poles of the cell.

• The nuclear envelope begins to reform around the separated chromosomes.

What occurs during prophase of mitosis?

• Chromatin condenses into visible chromosomes, the nuclear envelope breaks down, and spindle fibers begin to form.

• Chromosomes align at the cell's equator and spindle fibers attach to kinetochores.

• The nuclear envelope re-forms around the separated chromosomes and the cell prepares for cytokinesis.

• Chromatin is replicated and the cell prepares for DNA synthesis.

What are the main stages of the cell cycle?

• Interphase (G1, S, G2) and mitosis (prophase, metaphase, anaphase, telophase), followed by cytokinesis.

• Interphase (G1, S) and meiosis (prophase, metaphase, anaphase, telophase), followed by cytokinesis.

• Interphase (G1, G2) and mitosis (prophase, metaphase), followed by cell division.

• Interphase (G1, S, G2) and binary fission.

What is the longest phase of the cell cycle?

• Prophase

• Metaphase

• Interphase

• Telophase

How does telophase contribute to cell division?

• Telophase is the stage where chromosomes are replicated.

• Telophase is the final stage of mitosis where the chromosomes de-condense, the nuclear envelope re-forms around each set of chromosomes, and the cell prepares to divide.

• Telophase is when the cell membrane begins to pinch inwards to form two daughter cells.

• Telophase is the stage where the spindle fibers attach to the chromosomes.

What is cytoplasm and what is its role in a cell?

• Cytoplasm is a jelly-like substance that surrounds the nucleus only.

• Cytoplasm is a solid structure that holds the cell's shape.

• Cytoplasm is a jelly-like substance found inside a cell that surrounds the organelles, providing a medium for biochemical reactions.

• Cytoplasm is a type of organelle responsible for energy production.

What happens during the G1 phase of interphase?

• The cell divides into two daughter cells.

• The cell grows and synthesizes proteins necessary for DNA replication.

• The cell undergoes DNA replication.

• The cell prepares for mitosis.

What phase of mitosis is characterized by the separation of sister chromatids?

• Prophase

• Metaphase

• Anaphase

• Telophase

Describe the role of spindle fibers during mitosis.

• Spindle fibers are responsible for separating the sister chromatids and pulling them to opposite poles of the cell during mitosis.

• Spindle fibers help in the formation of the nuclear envelope during mitosis.

• Spindle fibers are involved in the replication of DNA before mitosis begins.

• Spindle fibers assist in the alignment of chromosomes at the equatorial plane during mitosis.