Problem:

Question 1: How is the genomic DNA in a stem cell most likely different from the genomic DNA in a differentiated cell?

1. All of the genes of DNA in stem cells are inactivated.
2. Stem cell genomic DNA has experienced few, if any, permanent changes in its gene expression profile.
3. Most genes in stem cells have been permanently activated.
4. Stem cells only produce proteins that allow other cells to differentiate.
5. Stem cells express less of their DNA than do fully differentiated cells.

Question 2: An apoptotic signal arising from within the cell is an example of one that will activate the ___ pathway.

1. intrinsic
2. caspase
3. death receptor
4. autophagy
5. extrinsic

Question 3: How does a single embryonic stem cell give rise to daughter cells that are liver cells and other daughter cells that are skin cells?

1. through division alone
2. through morphogenesis and division
3. through division and differentiation
4. through differentiation alone
5. through morphogenesis and differentiation

Question 4: Which statement correctly describes stem cells?

1. An embryonic stem cell is a cell in an organism that may divide indefinitely and has the ability to differentiate into different types of cells.
2. An adult stem cell is a cell that has the ability to give rise to an entire organism.
3. All types of stem cells can give rise to all the different types of cells in an organism.
4. Stem cells are cells that come from embryos.
5. Stem cells divide only into other stem cells.

Give reasoning with your answer.