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.
