An operona. is regulated by a repressor binding at the promoter.b. has structural genes that are all transcribed from the same promoter.c. have several promoters, but all of the structural genes are relatedbiochemically.d. is a set of structural genes that are all under the same translationalregulation.e. is transcribed when RNA polymerase binds the operator.

Name: An operona. is regulated by a repressor binding at the promoter.b. ha
Uploaded: 2024-03-20T06:42:41.000Z
Channel: Bartleby
Description: An operona. is regulated by a repressor binding at the promoter.b. has structural genes that are all transcribed from the same promoter.c. have several promoters, but all of the structural genes are relatedbiochemically.d. is a set of structural gen

When the RNA polymerase binds to the promoter, the operon is transcribed and some mRNAs are produced. In addition to the promoter, most operons feature other regulatory DNA regions. These sequences serve as binding sites for regulatory proteins that control whether an operon's expression is turned "up" or "down." Repressor proteins control expression by binding to the operator, a DNA sequence located near the promoter of an operon or a group of co-regulated genes. Repressor binding prevents RNA polymerase from attaching to the promoter, causing operon gene production to be suppressed.Prokaryotic structural genes with similar functions are frequently grouped into operons, with transcription regulated by a single promoter. Due to a single promoter and operator upstream of them, all the structural genes of an operon are switched ON or OFF at the same time, but sometimes more control over gene expression is required. Option B is correct. b. has structural genes that are all transcribed from the same promoter.