What does “lac operon” actually mean in Molecular Basis of Inheritance, and why does it matter for NEET?
in E. coli, lactose switches on the operon by inactivating the repressor so the lactose-digesting genes are transcribed.
In simple words: in E. coli, lactose switches on the operon by inactivating the repressor so the lactose-digesting genes are transcribed. Getting lac operon clear matters because NEET questions on Molecular Basis of Inheritance usually test this idea directly, not just a formula you memorised.
Key point
lac operon
Common mistake
thinking lactose directly builds the enzymes.
Memory tip
lactose just pulls the repressor off the operator -- it removes the 'off switch'.
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