110. The RecA protein is involved in
1. Transposition
2. Recombination
3. Replication
4. Transcription

Question:

The RecA protein is involved in:

1. Transposition

2. Recombination

3. Replication

4. Transcription

Correct Answer:

2. Recombination

Explanation:

The RecA protein plays a crucial role in genetic recombination, particularly in bacterial systems. It is a key player in homologous recombination, a process that repairs DNA by exchanging segments of similar or identical DNA sequences between two molecules.

Breakdown of each option:

1. Transposition:
   Transposition is the process by which mobile genetic elements, known as transposons, move from one location to another within the genome. While the RecA protein is not directly involved in transposition, other proteins like transposases are responsible for this process.

2. Recombination:
   RecA is involved in homologous recombination, a fundamental process for repairing double-strand breaks in DNA and for facilitating the exchange of genetic material. During recombination, RecA facilitates the pairing of homologous DNA sequences, enabling the repair or exchange of genetic material.

3. Replication:
   While RecA plays a role in DNA repair processes, DNA replication involves other proteins like DNA polymerase, helicase, and ligase. RecA’s primary role is in recombination and repair, not in the replication of DNA.

4. Transcription:
   Transcription refers to the process by which RNA is synthesized from a DNA template. This process involves RNA polymerase and other transcription factors, not the RecA protein.

Conclusion:

The RecA protein is most famously known for its essential role in genetic recombination. It is involved in repairing damaged DNA and ensuring the exchange of genetic material during recombination processes in bacteria.

Correct Answer: 2. Recombination