Which of the following bacteria is not a source of restriction endonuclease?
a. Haemophilus influenzae
b. Escherichia coli
c. Entamoeba coli
d. Bacillus amyloliquefaciens
The answer is the option (c) Entamoeba coli
Explanation: Entamoeba coli is not a bacterium and hence is not a source of restriction endonuclease.