Cells: Stability & Change Review

Which cell would be able to function most efficiently?

• a small cell

• a medium-sized cell

• a large cell

Which cell has the highest surface area-to-volume ratio (the largest surface area and smallest volume)?

• a small cell

• a medium-sized cell

• a large cell

Why can't cells keep growing forever? Choose the TWO correct answers.

• the cell membrane will eventually break

• the cytoplasm will eventually dry up

• their needs become too great to meet

• transporting materials becomes too slow

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Which of the following is NOT a way that cancer cells are produced?

• Being infected by other cancer cells

• DNA mutations

• Not responding to cyclin signals

• Ignoring cell checkpoints

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Why does DNA get copied during S phase?

• to make sure there are no mistakes

• both cells produced during mitosis will need their own copy

• to fix any mistakes that might be there

• a cell cannot grow without its DNA being copied

Which of these best describes what happens when cancer cells come in contact with other cells?

• They continue to divide in spite of external signals

• They stop dividing due to external signals

• They infect the other cells with their cancer genes

• They stop dividing due to internal signals

Which of the following is a method of treating cancer? Choose ALL that apply.

• Chemotherapy

• Radiation therapy

• Immunotherapy

• Surgery

Which of the following best describes a stem cell?

• a cell that can only be found in a developing organism

• a cell that grows only in the stem of a plant

• a cell that has already differentiated into a specific type of cell

• a cell that can become any other type of cell

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Which of the following are medical applications for stem cells? Choose the TWO correct answers.

• preventing you from catching COVID

• regrowing a damaged organ

• repairing damaged tissue

• detecting cancer in the body

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When you get cut, the damaged cells will send signals to healthy cells to begin dividing. When the damaged area is filled in, these signals stop along with cell division. What kinds of signals are involved in this process?

• Internal

• External

• Direct

• Indirect

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