Question

which of the following molecule(s) help(s) to hold the dna strands apart while they are being replicated?
primase
dna polymerase
single - strand binding proteins
ligase

Explanation:

Single - strand binding proteins (SSBs) are crucial in DNA replication. When the double - helix DNA is unwound by helicase, the single strands have a tendency to re - anneal (come back together). SSBs bind to the single - stranded DNA regions. They prevent the re - formation of the double - helix structure (re - annealing) by coating the single strands. This keeps the DNA strands apart, providing a stable single - stranded template for DNA polymerase to work on during replication.

Ligase is involved in joining Okazaki fragments (on the lagging strand) by forming phosphodiester bonds. DNA polymerase is responsible for synthesizing new DNA strands by adding nucleotides. Primase synthesizes RNA primers which are needed for DNA polymerase to start DNA synthesis. None of these directly function to hold the DNA strands apart like single - strand binding proteins.

Answer:

Single - strand binding proteins