Cell Cycle and Mitosis

What is the longest stage of the cell cycle called?

• Cytokinesis

• M phase

• Interphase

• G1 Phase

Answer explanation

The longest stage of the cell cycle is called Interphase. It encompasses G1, S, and G2 phases, during which the cell grows, duplicates its DNA, and prepares for mitosis, making it significantly longer than M phase or cytokinesis.

During what phase of the cell cycle does cell division occur?

• Interphase

• M phase

• S phase

• G2 phase

Answer explanation

Cell division occurs during the M phase of the cell cycle, which includes mitosis and cytokinesis. Interphase, S phase, and G2 phase are preparatory stages, not the actual division.

Tags

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During what phase of the cell cycle is DNA replicated?

• G1 phase

• S phase

• G2 phase

• M phase

Answer explanation

DNA is replicated during the S phase of the cell cycle. This phase specifically focuses on synthesizing new DNA, ensuring that each daughter cell receives an identical set of chromosomes after cell division.

During what phase of the cell cycle does the cell grow?

• G1 phase

• S phase

• M phase

• Cytokinesis

Answer explanation

The G1 phase is the first stage of interphase where the cell grows and prepares for DNA replication. During this phase, the cell increases in size and synthesizes proteins necessary for DNA synthesis.

Put the following stages of mitosis in order: anaphase, prophase, metaphase, and telophase. 

• prophase, metaphase, telophase, anaphase

• prophase, anaphase, metaphase, telophase

• prophase, metaphase, anaphase, telophase

• prophase, telophase, metaphase, anaphase

Answer explanation

The correct order of mitosis stages is prophase, where chromosomes condense; metaphase, where they align at the equatorial plane; anaphase, where sister chromatids separate; and telophase, where the nuclear envelope reforms.

Tags

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Put the following actions in order: DNA replicates, cell grows, cell divides, cell prepares for mitosis. 

• DNA replicates, cell grows, cell prepares for mitosis, cell divides

• cell grows, cell prepares for mitosis, DNA replicates, cell divides

• cell grows, DNA replicates, cell prepares for mitosis, cell divides

• DNA replicates, cell prepares for mitosis, cell grows, cell divides

Answer explanation

The correct order is: cell grows, DNA replicates, cell prepares for mitosis, and then cell divides. This sequence reflects the cell cycle stages where growth occurs before DNA replication and preparation for division.

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Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?

• In order for genetic information to be transferred into daughter cells.

• In order for the cell to be able to increase in size.

• In order for the DNA to be contained in the nucleus.

• In order for the cell to re-order the DNA sequencing in the new cells.

Answer explanation

Replicating DNA before cell division is crucial to ensure that each daughter cell receives an identical set of genetic information. This process maintains genetic continuity and is essential for proper cell function.

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NGSS.HS-LS3-2

Where does Mitosis take place?

• where growth and repair are happening

• in your hair cells only

• in your blood cells only

• in gametes

Answer explanation

Mitosis occurs in areas of the body where growth and repair are needed, such as skin and tissues, not just in hair or blood cells, and it does not occur in gametes, which undergo meiosis.

Tags

NGSS.HS-LS1-4

Match the image to the correct answer

• Cytokinesis

• 
• Anaphase

• 
• Telophase

• 
• Metaphase

• 
• Prophase

• 

Tags

NGSS.HS-LS1-4

Label the parts of the Cell Cycle

a

b

c

d

G2

Mitosis

G1

S phase

Tags

NGSS.HS-LS1-4