Final answer:
Long noncoding RNA (lncRNA) can function as a transcriptional regulator and play a role in regulating gene expression.
Step-by-step explanation:
Long noncoding RNA (lncRNA) can function as a transcriptional regulator. They play a role in regulating gene expression by interacting with DNA, RNA, and proteins. They can affect gene expression by binding to specific DNA regions and recruiting transcriptional machinery or inhibiting the binding of transcription factors.