Genetically modified organisms and recombinant DNA 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. Which enzyme cuts DNA at a specific recognition sequence?
- A. DNA ligase
- B. Restriction endonuclease
- C. DNA polymerase
- D. Helicase
2. What bond does DNA ligase form?
- A. Hydrogen bonds between bases
- B. Peptide bonds
- C. Glycosidic bonds between glucose
- D. Phosphodiester bonds between nucleotides
3. Why do the sticky ends of a cut plasmid and a cut gene join?
- A. They are complementary and base pair
- B. DNA ligase is not needed
- C. They have identical sequences
- D. They are held by peptide bonds
4. A GM tobacco plant is regenerated from leaf cells grown on a medium containing kanamycin. Why is kanamycin used?
- A. It stimulates cells to divide
- B. It cuts the plasmid
- C. It kills cells that did not take up the kanamycin-resistance gene
- D. It makes the antibody gene work
5. Why is human antithrombin made in the milk of GM goats rather than in E. coli?
- A. Goat cells are prokaryotic
- B. Goat cells, being eukaryotic, can modify a large human protein correctly, and milk is easily harvested
- C. Goats have no restriction endonucleases
- D. E. coli cannot use plasmids