Restriction enzymes are named for …….
a) the person who discovered
b) the viral DNA that they attack
c) the bacterium they are derived from
d) all of these
What is the natural function of restriction enzymes?
a) protecting bacteria by cleaving their own DNA
b) protecting bacteria by methylating
their own DNA
c) protecting bacteria by cleaving the DNA of infecting viruses
d) all of these
Restriction enzyme are of great use in genetic engineering because ……
a) they DNA at several specific levels
b) they cut DNA at a specific base level
c) they help in binding the pieces of DNA
d) they are nuclease
Which of the following is the source of EcoRI restriction endonucleases enzyme?
a) Nocardia otitidis
b) Haemophilus influenze
c) Escherichia coli
d) Bacillus amyloliquefaciens
Explanation: Escherichia coli (abbreviated as E. coli) are bacteria found in the environment, foods, and intestines of people and animals
Which of the following is the source of BamHI restriction endonucleases enzyme?
a) Nocardia otitidis
b) Haemophilus influenze
c) Staphylococcus aureus
d) Bacillus amyloliquefaciens
Explanation: Bacillus amyloliquefaciens is a species of bacterium in the genus Bacillus that is the source of the BamHI restriction enzyme
Which of the following is the source of HindIII restriction endonucleases enzyme?
a) Nocardia otitidis
b) Haemophilus influenze
c) Escherichia coli
d) Bacillus amyloliquefaciens
Explanation: Haemophilus influenzae is a Gram-negative, non-motile, coccobacillary, facultatively anaerobic, capnophilic pathogenic bacterium of the family Pasteurellaceae
