Question

Maltose binding protein is the product of ______ gene in E.coli and located in ______

(a) malE, nucleus

(b) malD, nucleus

(c) malE, periplasmic space

(d) malD, periplasmic space

The question was posed to me in an interview for internship.

This key question is from Fusion Proteins in section Use of Cloned DNA of Genetic Engineering

Answer 1

Right option is (c) malE, periplasmic space

For explanation: Maltose binding protein is the product malE gene in E.coli and is located in the periplasmic space. It is responsible for uptake of maltose and other sugars.