The study of escherichia coli (e. coli) led researchers to new experimental designs for studying operons. which experimental design did the scientists use?
use a microscope to observe cell division to determine the structure of operons.
test the response of e. coli to a variety of chemicals to determine the number of operons that are present.
insert the operons from one organism into another to determine the mechanism of operon expression.
read the genome sequence to determine the quantity and organization of operons.

The correct option is this:READ THE GENOME SEQUENCE TO DETERMINE THE QUANTITY AND ORGANISATION OF OPERONS.

E.coli played a significant role in the establishment of the fundamental basics of molecular biology. Its lactose operon was used by scientists to read and to determine the sequence and organization of operons. The gene regulation mechanism of E.coli led scientists to the identification of Lac repressor and the discovery of messenger RNA. The lactose genes have many applications in the molecular biology field today.

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explanation:

meiosis is the correct answer