Answer:
Part of a strand of DNA with regulatory sequences is Lac gene.
Step-by-step explanation:
- Genes are the part of DNA that helps in development of traits of individual and helps in inheriting characteristics to offspring.
- In Lac gene(operon, which is fundamental unit of DNA) gene regulation (first genetic regulatory mechanism) was clearly observed for the first time.
- Lac gene is a gene that is required for the 'breakdown of lactose' and also helps in transporting of it.
- There are types of lac genes differing in structure are: LacA, LacY, LacZ.