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  4. Which enzyme's will be produced in a cell in which there is a nonsense mutation in the lac Y gene ?

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Q. Which enzyme's will be produced in a cell in which there is a nonsense mutation in the lac Y gene ?

NEETNEET 2013Molecular Basis of Inheritance

Solution:

β -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 β -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.