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Question

The protein required for the transport of galactose across the cell membrane in E. coli is

A
Allolactase
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B
β-galactosidase
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C
Galactose permease
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D
Transcriptase
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Solution

The correct option is C Galactose permease
The numerous permeases that belong to ABC superfamily of proteins is present in number of bacterial cell. The ATP is hydrolysed by these proteins to transport specific amino acids, sugars, vitamins, or even peptides into the cells. One such permease is galactose permease, which is responsible for transportation of galactose.

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