Question

as dna replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two component strands. i his un
sort the phrases into the appropriate bins depending on which protein they describe.
view available hint(s)
helicase
binds at the replication fork
binds after the replication fork
binds ahead of the replication fork
breaks h - bonds between bases
prevents h - bonds between bases
breaks covalent bonds in dna backbone
topoisomerase
single - strand binding protein
reset
help

Explanation:

Helicase is an enzyme that plays a crucial role in DNA replication. It breaks the hydrogen bonds between the base pairs of the DNA double helix, allowing the two strands to separate. This separation is essential for the replication process to proceed. The phrase "breaks H - bonds between bases" accurately describes the function of helicase.

Topoisomerase is another enzyme involved in DNA replication. As the DNA unwinds during replication, it can become supercoiled, which can hinder the replication process. Topoisomerase acts ahead of the replication fork. It breaks covalent bonds in the DNA backbone, relieves the supercoiling, and then reseals the bonds. So, the phrase "binds ahead of the replication fork" and "breaks covalent bonds in DNA backbone" are appropriate for topoisomerase.

Single - strand binding protein (SSB) binds after the replication fork. Once the DNA strands are separated by helicase, SSB binds to the single - stranded DNA. Its function is to prevent the re - formation of hydrogen bonds between the base pairs of the single - stranded DNA, keeping the strands apart and accessible for the replication machinery. So, the phrase "binds after the replication fork" and "prevents H - bonds between bases" are correct for single - strand binding protein.

Answer:

• Helicase: breaks H - bonds between bases
• Topoisomerase: binds ahead of the replication fork, breaks covalent bonds in DNA backbone
• Single - strand binding protein: binds after the replication fork, prevents H - bonds between bases