Cell Growth and Cell Size

Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?

• Cell division is a completely random process

• Once cells divide, they can never divide again

• The controls on cell growth and division can be turned on and off

• There is only a limited amount of DNA available to a given group of cells

Which of the following happens when a cell divides?

• The cell's volume increases

• It becomes more difficult for the cell to get rid of wastes

• Each daughter cell receives its own copy of the parent cell's DNA

• It becomes more difficult for the cell to get enough oxygen and nutrients

Tags

NGSS.HS-LS1-4

Cancer is a disorder in which some cells have lost the ability to control their

• size

• spindle fibers

• growth rate

• surface area

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NGSS.HS-LS1-4

Cancer cells form masses of cells called

• tumors

• cyclins

• growth factors

• p53

Which diagram shows cancer cells?

• A

• B

Cells of organisms must go through cell division for?

• growth

• repair of damaged cells

• replacement of dying cells.

• All of these

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NGSS.HS-LS1-4

Cells grow, carry out normal functions, and copy their organelles.

• G1

• S

• G2

• M phase

Cells go through additional growth.

• G1

• S

• G2

• M phase

What is the primary reason cells divide rather than continue to grow indefinitely?

• To increase the cell's surface area to volume ratio

• To decrease the cell's surface area to volume ratio

• To increase the cell's volume

• To decrease the cell's volume

Tags

NGSS.HS-LS1-4

Which phase of the cell cycle is primarily responsible for cell growth?

• G1 phase

• S phase

• G2 phase

• M phase