Question

RPA (replication protein A)

a) Protein responsible for DNA replication
b) Enzyme involved in RNA processing
c) Ribosomal protein aiding in protein synthesis
d) Transcription factor regulating gene expression

Answer 1

RPA is a protein essential for DNA replication, functioning at the replication fork to stabilize single-stranded DNA.

Step-by-step explanation:

Replication Protein A (RPA) is a protein responsible for stabilizing single-stranded DNA during replication and repair processes. It is not an enzyme involved in RNA processing, a ribosomal protein aiding in protein synthesis, nor a transcription factor regulating gene expression.

Instead, it plays a crucial role in DNA replication, particularly at the replication fork where it binds to single-stranded DNA to prevent it from winding back into a double helix, allowing replication to proceed efficiently.