What describes the role of single-strand binding proteins?

Study for the IMAT Biology Exam with focused multiple-choice questions. Use hints and explanations to enhance your preparation. Get ready for your exam success!

Multiple Choice

What describes the role of single-strand binding proteins?

Single-strand binding proteins stabilize unpaired DNA strands during replication. After helicase unwinds the double helix, these proteins bind to the exposed single-stranded DNA to prevent it from re-annealing and to protect it from nucleases. This keeps the template ready for DNA polymerases to copy, especially helping keep the lagging strand in a usable state between short fragments. They do not ligate DNA fragments, unwind the DNA, or synthesize RNA primers—functions carried out by ligase, helicase, and primase, respectively.

Single-strand binding proteins stabilize unpaired DNA strands during replication. After helicase unwinds the double helix, these proteins bind to the exposed single-stranded DNA to prevent it from re-annealing and to protect it from nucleases. This keeps the template ready for DNA polymerases to copy, especially helping keep the lagging strand in a usable state between short fragments. They do not ligate DNA fragments, unwind the DNA, or synthesize RNA primers—functions carried out by ligase, helicase, and primase, respectively.

More practice questions