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Question

Select the option with correct match of genes of Lac operon with their respective products.

A
I gene - β-galactosidase
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B
Z gene – Permease
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C
Y gene - Repressor
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D
A gene – Transacetylase
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Solution

The correct option is D A gene – Transacetylase

An operon is a part of the genetic material (or DNA) which is a set of coordinated group of genes that act as a single regulatory unit having one or more structural genes, an operator gene and a promoter gene.

i - Repressor- a protein that suppresses transcription

z - β-galactosidase - digests lactose

y - Permease - increases permeability of lactose into the cell

a - Transacetylase - plays an important role in lactose utilisation


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