Isopropyl β-d-1- thiogalactopyranoside (IPTG) ,a lactose analog,acts as an inducer of the lac operon.What is its mode of action?
A) It functions as a co-activator of gene expression.
B) It inactivates the LacI repressor protein.
C) It activates the enzyme β-galactosidase.
D) It binds the RNAP for enhanced binding to the promoter.
E) It binds to the operator to enhance transcription initiation.
Correct Answer:
Verified
Q1: Expression of genes that are constitutive is:
A)regulated
Q2: What does sigma factor helps the RNA
Q3: Cyclic AMP concentrations within an E.coli cell
Q4: The catabolite activator protein (CAP)activates transcription of
Q6: During negative regulation of gene expression the
Q7: Which is true of catabolite repression?
A)It results
Q8: Which of these is required for transcription
Q9: When does repression of the lac operon
Q10: The most commonly observed promoter sequence seen
Q11: Tryptophan has the molecular property of:
A)being able
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