Neet Solved Paper 2013 Question 79

Question: Which enzyme/s will be produced in a cell in which there is a non-sense mutation in the lac Y gene?

Options:

A) $ \beta\text{ -} $ galactosidase

B) Lactose permease

C) Transacetylase

D) Lactose permease and transacetylase

Show Answer

Answer:

Correct Answer: A

Solution:

$ \beta\text{ -} $ 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

$ \beta\text{ -} $ 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.