D1.3 Mutation and gene editing Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. A mutation adds one base near the start of a gene. What is this?
- A. A silent substitution
- B. A frameshift insertion
- C. A deletion
- D. An SNP
2. Why can a base substitution leave a polypeptide unchanged?
- A. DNA polymerase corrects it
- B. The genetic code is degenerate
- C. Insertions cancel it out
- D. Substitutions only occur in introns
3. Which is a mutagenic form of radiation?
- A. Infrared
- B. Radio waves
- C. Ultraviolet light
- D. Visible red light
4. A mutation in a skin cell leads to a tumour. Which statement is true?
- A. It will be inherited by the person's children
- B. It is a somatic mutation and is not inherited
- C. It must be a germ-line mutation
- D. It cannot cause cancer
5. What is the original source of all genetic variation?
- A. Crossing over
- B. Natural selection
- C. Gene mutation
- D. Random fertilisation