Question

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

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

Answer 1

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