3. Genetics

Dna Structure — Quiz

Test your understanding of dna structure with 5 practice questions.

Practice Questions

Question 1

Which of the following scenarios would most directly lead to a frameshift mutation during DNA replication?

Question 2

Consider a segment of a DNA molecule that is undergoing replication. If a newly synthesized lagging strand fragment is moving away from the replication fork, which enzyme is primarily responsible for extending this fragment by adding deoxyribonucleotides?

Question 3

The stability of the DNA double helix is significantly influenced by the stacking interactions between adjacent base pairs. Which of the following best describes the nature of these stacking interactions?

Question 4

If a novel organism's DNA is found to have a base composition where the percentage of adenine (A) is $35\% $, what would be the expected percentage of guanine (G) in its DNA, assuming it follows Chargaff's rules?

Question 5

During DNA replication, the leading strand is synthesized continuously, while the lagging strand is synthesized in fragments. This difference in synthesis is primarily due to which fundamental characteristic of DNA polymerase?