Biology · Genetics and Molecular Biology
Identify the correct statement about a 'gratuitous inducer' from the options given below:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It can bind with the promoter region of a gene but cannot facilitate gene expression.
- 2Isopropyl β-D-1-thiogalactopyranoside (IPTG) is a gratuitous inducer that structurally resembles lactose.✓
- 3It is only after the binding of a gratuitous inducer with the main inducer molecule that a gene can be expressed.
- 4It resembles the inducer molecule but has no role in gene expression.
Correct answer
Isopropyl β-D-1-thiogalactopyranoside (IPTG) is a gratuitous inducer that structurally resembles lactose.
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