Final answer:
Trans-acting elements are proteins like transcription factors that bind to transcripts, acting at a distance and not physically linked to the gene they regulate.
Step-by-step explanation:
The elements that typically come from outside and bind to the transcript in some area are known as B. Trans-acting elements. These are often proteins, such as transcription factors, that can diffuse through the cell and interact with specific sequences on the DNA or RNA transcripts. Unlike cis-acting elements, which are DNA sequences located on the same DNA molecule as the gene they regulate, trans-acting elements can act at a distance and are not physically linked to the gene they control.
Trans-acting elements are regulatory factors that bind to specific sequences on the transcript and can come from outside the cell. They can include transcription factors, RNA binding proteins, and small regulatory RNAs. These elements can influence gene expression and play a role in various cellular processes.