Multiple Choice
Which of the following enzymes is responsible for removing RNA primers and replacing them with DNA?
3967
views
20
rank
14. DNA Synthesis
Steps of DNA Replication
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Once the DNA at the replication fork is unwound by helicases, what prevents the two strands from coming back together to re-form a double helix?
A
The helicase modifies the DNA in such a way as to eliminate the affinity between the two strands.
B
DNA polymerase follows the helicase so closely that there is no chance for the strands to come back together.
C
The helicase pushes the two strands so far apart that they have no chance of finding each other.
D
One of the strands is rapidly degraded, preventing the double helix from re-forming.
E
Single-strand binding proteins bind the unwound DNA and prevent the double helix from re-forming.
Verified step by step guidance1
Understand the role of helicase: Helicase is an enzyme that unwinds the DNA double helix at the replication fork, separating the two strands to allow replication to occur.
Identify the problem: Once the DNA strands are separated, they have a natural tendency to re-anneal or come back together due to complementary base pairing.
Consider the options: Evaluate each given option to determine which mechanism actually prevents the re-formation of the double helix.
Recognize the role of single-strand binding proteins: These proteins bind to the separated DNA strands, stabilizing them and preventing them from re-annealing.
Conclude with the correct mechanism: Single-strand binding proteins are crucial in maintaining the separation of DNA strands during replication, ensuring that the replication process can proceed efficiently.
9:29mWatch next
Master Steps of DNA Replication with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Steps of DNA Replication practice set
Problem sets built by lead tutorsExpert video explanations