AP BIOLOGY

Detailed explanation-1: -The process of turning genes on and off is known as gene regulation. Gene regulation is an important part of normal development.

Detailed explanation-2: -The presence of a nucleus thus allows gene expression to be regulated by posttranscriptional mechanisms, such as alternative splicing. By limiting the access of proteins to the genetic material, the nuclear envelope also provides novel opportunities for the control of gene expression at the level of transcription.

Detailed explanation-3: -So, Regulatory genes are involved in turning off or on, the transcription of a set of genes. Operator gene-It controls the synthesis of mRNA over the structural genes.

Detailed explanation-4: -Gene expression be thought of as an “on/off switch” to control when and where RNA molecules and proteins are made and as a “volume control” to determine how much of those products are made. The process of gene expression is carefully regulated, changing substantially under different conditions and cell types.