Keep the Highest: S/10 Attempts: Aa Aa 2. Regulation of prokaryotic gene express

Question

Keep the Highest: S/10 Attempts: Aa Aa 2. Regulation of prokaryotic gene expression The Escherichia coli bacterial chromosome contains several thousand genes. Some of these genes are so dosely inked that they are transcribed together as a single long mRNA. These genes usually function together in the same pathway, so either all of them are needed or none of them are. Expression of these genes is often controlled by the presence of a repressor or activator protein at a regulatory site called the operator transcription unit operon The trp genes encode enzymes that synthesize the amino acid tryptophanrom s precursur mo?ecule. Expression of the trp genes depends on whether tryptophan is already available in the environment. In the following diagram complete the missing information describing the expression level of the trp genes (dark grey segments) when Trp repressor molecules are active RNA polymerase bind to the promoter, so expression of trp operon genes Tryptophan must be when Trp reoressor molecules are 0 Type here to search DOLL Fe F9 10F11 t2@ 3£4¢5? 6? A & 8 2 9 3 0 114 WE R K L

Explanation / Answer

1- operator

2- cannot , doesnot occur

Note- the repressor protein bind to operator doesnot allow rna polymerase to bind to promoter to activte transcription . When trp is repressor active the operon is inactive . The operator region regulte the operon activation inactivation.

Related Questions

Navigate

• Browse (All)
• Browse K
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.