Question

which statement(s) about repressible operons is/are correct? select all that apply. a repressible operon is on unless a corepressor is present. repressible operons usually contain genes that code for anabolic enzymes. in a repressible operon, the repressor is synthesized in an active form. request answer

Answer 1

Repressible operons are on unless a corepressor is present, contain genes for anabolic enzymes, and have an active form of repressor.

Step-by-step explanation:

Repressible operons are a type of gene regulation mechanism in prokaryotic cells. These operons are usually on unless a corepressor is present. A corepressor is a small molecule that binds to a repressor protein, causing it to bind to the operator region and block transcription. Repressible operons typically contain genes that code for anabolic enzymes, which are enzymes involved in biosynthetic pathways. In these operons, the repressor is synthesized in an active form, meaning it can bind to the operator and inhibit transcription when the corepressor is present. So, the correct statements about repressible operons are:

1. A repressible operon is on unless a corepressor is present.
2. Repressible operons usually contain genes that code for anabolic enzymes.
3. In a repressible operon, the repressor is synthesized in an active form.