Final answer:
Sequences that undergo V(D)J recombination are flanked by RSS (Recombination Signal Sequences), which facilitate the development of diverse antibodies in B cells. A promoter is a specific sequence of DNA nucleotides essential for initiating transcription, while enhancers are DNA sequences that promote transcription through interaction with transcription factors.
Step-by-step explanation:
Sequences that undergo V(D)J recombination are flanked by c) RSS (Recombination Signal Sequences).
RSS are crucial for the immune system's ability to generate a diverse set of antibodies. By guiding the V(D)J recombination process in developing B cells, RSS ensure that each antibody has a unique variable region capable of binding to a different antigen. This diversity is vital for recognizing and neutralizing a wide array of pathogens.
Regarding a promoter, it is a a) specific sequence of DNA nucleotides that plays an essential role in the initiation of transcription by binding transcription factors to increase the efficiency of transcription. Enhancers, on the other hand, are DNA sequences composed of distal control elements that promote transcription by interacting with transcription factors and mediators, as described in enhancer regions information.