Science Test 2.4

A young deer needs cell division to grow to its full size. However, a deer’s cells continue to divide through its whole life. Why do an adult deer’s cells continue to divide?

Cells start to divide when they receive a signal. They continue to divide until they get another signal to stop. A cell with damaged DNA may not respond to the stop signal. The cell can become cancerous and divide uncontrollably. The cancerous cell and all its daughter cells can form a tumor. During which step of the cell cycle does a cell get a signal to begin cell division?

In 1825, French scientist François-Vincent Raspail became the first scientist to observe that every cell is produced through cell division. How is cell division different in single-celled organisms than in multi-celled organisms?

Meara and Mara are inspecting microscope slides. Each slide shows a cell or cells. The students’ task is to identify which stage of the cell cycle each slide shows. Meara reads, “Squamous cells from human cheek swab.” “I recognize this one. It's in interphase,” says Mara, peering into the microscope. Based on Mara's observation, what might have been happening in the cells at the time they were collected?

Aiden and David are inspecting microscope slides. Each slide shows a cell or cells. The students’ task is to identify which stage of the cell cycle each slide shows. David looks at the slide, which is illustrated in the drawing below. “It kind of looks like telophase. Do you see that the genetic material is already divided in two?” Aiden takes a turn at the microscope. “Yes, but what’s that line going down the middle? Is this two different cells?” he asks. Then, describe what is happening to the cell or cells.

Why is it important for cells in your body to undergo mitosis?

What type of cell forms a cell plate during cytokinesis, since its cell wall will not allow the cell membrane to "pinch in"?

A cell spends most of its life in:

During what phase of mitosis does the DNA condense into two separate chromosomes (made of two chromatids connected by a centromere)?

During what phase of mitosis are the chromatids pulled to opposite ends of the cell?

During what phase of mitosis do fibers connected to the centrioles pull the chromatids apart into each side of the cell?

During what phase of mitosis do the chromosomes line up along the center of the cell?

Which of the following scenarios would not prompt a cell to divide?

What is the first step in a bone healing?

What is a series of connected events that happen in a specific order?

When a cell divides what do we call its offspring?

When DNA (deoxyribonucleic acid) copies itself, we call the process:

The whole purpose for mitosis is for:

Which is not a part of mitosis?