Mutations Quiz
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5 questions, one answer each
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1. A base in the middle of a gene is replaced by another base. What is this called?
- A. A deletion
- B. An insertion
- C. A substitution
- D. A frameshift
2. Why might a substitution have no effect on the protein?
- A. The genetic code is degenerate
- B. The code is non-overlapping
- C. The mRNA is not made
- D. The ribosome skips it
3. Which mutation is most likely to cause a frameshift?
- A. A substitution
- B. A deletion of one base
- C. A deletion of three bases
- D. A silent mutation
4. What does the CFTR protein do?
- A. Transports chloride ions out of cells
- B. Transports water by active transport
- C. Makes mucus
- D. Breaks down bacteria
5. Why is the mucus thick in a person with cystic fibrosis?
- A. Too much water leaves the cells
- B. Chloride ions are not transported out, so less water leaves by osmosis
- C. Cilia make too much mucus
- D. Bacteria thicken it by absorbing water