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Molecular Biology
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Which of the following genes is expressed at a constant rate, without being subjected to regulation?
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A
Constitutive gene
💡 Explanation:
Constitutive genes are expressed continuously at a constant rate without regulation - they're 'housekeeping' genes essential for basic cellular functions like metabolism, structure, and maintenance. Unlike regulated genes that respond to environmental signals, constitutive genes maintain baseline expression levels. Gratuitous inducer genes, repressor genes, and oncogenes are all subject to regulation.