STANDARD Botany Restriction Enzymes MCQ Question

The first restriction enzyme, EcoRI, was isolated from the bacterium Haemophilus influenzae, which is known for its ability to cut DNA at specific sequences, a key feature utilized in molecular biology for cloning and genetic engineering. In contrast, while E. coli (option A) is a well-known source of various restriction enzymes, it was not the first; Pseudomonas (option C) and Xanthomonas (option D) are not recognized for producing restriction enzymes at all. Understanding the origins of restriction enzymes is crucial, as they play a vital role in biotechnology applications, including gene manipulation and DNA analysis.