Final answer:
True. Regulatory genes produce enzymes and other proteins that either switch on or turn off other segments of DNA. Regulatory proteins, such as transcription factors, bind to specific regulatory elements on DNA, either activating or repressing transcription of target genes.
Step-by-step explanation:
True. Regulatory genes produce enzymes and other proteins that either switch on or turn off other segments of DNA. This process, known as gene regulation, is essential for regulating gene expression and ensuring that the correct proteins are produced when and where they are needed. Regulatory proteins, such as transcription factors, bind to specific regulatory elements on DNA, either activating or repressing transcription of target genes.