Question
Biology Question on the molecular basis of inheritance
Which enzyme's will be produced in a cell in which there is a nonsense mutation in the lac Y gene ?
A
Lactose permease and transacetylase
B
?-galactosidase
C
Lactose permease
D
Transacetylase
Answer
?-galactosidase
Explanation
Solution
? -galactosidase is a structural gene present in segment of DNA, which carry Icdes for the synthesis of protein. Mutation in the lac Ygene of E.coli needs residues of cytoplasmic enzyme ? -galactosidase. Lactose permease is a membrane protein, which is a major facilitator superfamily. Transacetylase is an enzyme transferring acetyl groups from one compound to another.