NEET2019ZoologyMolecular Basis of InheritanceActual
Match the following genes of the Lac operon with their respective products: Column-I Column-II a   i gene   i ß-galactosidase b z gene i i Permease c a gene i i i Repressor d   y gene i v   Transacetylase Select the correct option.
Options
- Aa - i ; b - i i i ; c - i i ; d - i v
- Ba - i i i ; b - i ; c - i i ; d - i v
- Ca - i i i ; b - i ; c - i v ; d - i i
- Da - i i i ; b - i v ; c - i ; d - i i
Correct answer
C. a - i i i ; b - i ; c - i v ; d - i i
Step-by-step solution
The lactose or lac operon of Escherichia coli is a cluster of three structural genes encoding proteins which is involved in lactose metabolism and the sites on the DNA taking part in regulation of the operon. The three genes are: A lacZ: it encodes for enzyme β-galactosidase (which splits lactose into glucose and galactose); B lacY: it encodes for lactose permease; and C lacA: It encodes for lactose transacetylase. Functional β-galactosidase and lactose permease are necessary for the usage of lactose by t