Cell Differentiation

Which is true about Adult Stem Cells.

• They no longer do mitosis, their cell type is set and can not change
• They are limited to the type of  cell they can become.
• They can become any cell type in the body
• They are found in embryos

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Which is true about Embryonic Stem Cells.

• They no longer do mitosis, their cell type is set and can not change
• They are limited to the type of cell they can become
• They can become any cell type in the body
• They are found in adults

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In what way is the DNA of a nerve cell different from the DNA of a muscle cell?

• The DNA is the same but each cell contains different genes
• The DNA is the same but different genes are turned on and turned off in each cell
• The DNA is different, but the same genes are turned on and off in each cell
• The DNA is different, but each cell contains the same genes

The diagram shows the process of cell specialization from a single stem cell. Which of the following statements is true about the process of specialization.

• Specilized cells (blood, skin, nervous etc) cannot be produced from a single stem cell
• Specilized cells are produced immediately following fertilization
• Even though all the cells in an organism come from one single cell, they can specialize into different cell types
• Sincce all the cells in an organism come from one single cell, they must all have the same structure and function

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How do stem cells know what type of cells to differentiate into?

• The nucleus has instructions to turn some genes on and some genes off
• Signals from chemicals in the organism or from the environment determine which genes will be turned on and off
• Genes turn on and off randomly
• The cell has unique DNA that determines what the cell will become.

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Which types of cells are undifferentiated?

• nerve cells
• red blood cells
• stem cells
• white blood cells

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