Cells, Cell Cycle and Regulation/Cancer

Match each phase with its correct description

• S Phase

• • FINISHES GROWING

  • Errors in DNA replication are checked- if something is wrong, cell needs to fix its errors before it divides!

• G2 Phase

• Cell grows rapidly while carrying out normal functions.

• G1 Phase

• Cells must replicate their DNA before cell division to ensure that identical genetic information is passed to  the next generation.

A scientist examines two tissue samples under a microscope and records the number of cells in each phase of the cell cycle, as shown in the table below.

Based on this data, what conclusion can be made about the difference between Sample X and Sample Y?

• Sample X is likely cancerous because most cells are in interphase.

• Sample Y is likely cancerous because more cells are actively dividing.

• Sample X and Sample Y are both cancerous since mitosis is occurring in both.

• Sample Y is healthy because its cells are dividing more frequently, promoting tissue growth.

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Click where DNA replication takes place

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During which phase of the cell cycle does the cell spend the most time?

• Mitosis

• Cytokinesis

• Interphase

What is the end result of the cell cycle?

• 4 different daughter cells

• 2 different daughter cells

• 4 identical daughter cells

• 2 identical daughter cells

Answer explanation

In the cell cycle, they start with 1 cell and divide into 2 cells that are exactly the same.

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Which phase is pictured?

• G1

• S

• G2

• Binary Fission

According to the graph, which number represents S Phase?

• I (1)

• II (2)

• III (3)

• IV (4)

Answer explanation

During the II phase, DNA increases. In S phase, DNA is copied and creates 2 DNA strands.

After mitosis, the cytoplasm and organelles are divided between the two new forming cells in a process called

• centriole

• chromatin

• cytokinesis

• centromere

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When cells go through mitosis repeatedly without entering interphase, this results

• arthritis

• cancer

• mutation

• diabetes

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Cells of organisms must go through cell division for?

• growth

• repair of damaged cells

• replacement of dying cells.

• Tp increase the size of all cells

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