Stem cells Quiz
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5 questions, one answer each
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1. Which cells can form the placenta?
- A. Pluripotent cells of the blastocyst
- B. Multipotent bone marrow cells
- C. Totipotent cells of the early embryo
- D. Fully differentiated fibroblasts
2. Which statement about pluripotent cells is correct?
- A. They form only blood cells
- B. They can form all body cell types but not the placenta
- C. They cannot divide
- D. They have lost genes during development
3. What causes cells to lose potency as the embryo develops?
- A. Loss of genes from the nucleus
- B. Mutation of the DNA sequence
- C. Epigenetic modification of gene expression
- D. Replacement of the nucleus
4. What is the role of Oct4 and Sox2 in making iPS cells?
- A. They act as transcription factors that switch on pluripotency genes
- B. They are enzymes that cut DNA
- C. They carry the genes into the cell as a vector
- D. They are antibiotics that select the cells
5. Why are iPS cells from the patient's own skin less likely to be rejected?
- A. They are totipotent
- B. They are genetically identical to the patient
- C. They contain no antigens at all
- D. They do not divide