Question

As dna replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two component strands. this unwinding and separating of the dna requires three different types of proteins: helicase, topoisomerase, and single-strand binding proteins.

- 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

Answer 1

Step-by-step explanation:

Here is the correct match between the proteins and their functions in DNA replication:

Helicase: binds at the replication fork and breaks H-bonds between bases, unwinding the double helix.

Topoisomerase: binds after the replication fork and breaks covalent bonds in the DNA backbone, relieving the tension created by the unwinding of the double helix.

Single-strand binding proteins: binds ahead of the replication fork and prevents H-bonds between bases, stabilizing the separated DNA strands and preventing them from re-forming the double helix.

Together, these three proteins work to separate the parental double helix and prepare the individual strands for the synthesis of new DNA strands during replication.