First slide
Regulation of Gene Expression

Match the List I with List II with respect to lac operon 

 List – I List – II
A)Product of gene yi)Repressor
B)Product of gene zii)Transporter protein
C)Product of gene iiii)Hydrolase
D)Product of gene aiv)Transferase


In lac operon, gene y is expressed to form transporter protein known as permease (symporter) that actively transports lactose into a cell. Gene z is expressed to form a hydrolase known as β-galactosidase, gene a is expressed to form a transferase known as transacetylase. Gene i has information for the formation of repressor protein of lac operon that can bind to operator to prevent the transcription of structural genes of lac operon.

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