________ are a major source of restriction enzymes.
A) Plant cells
B) Human cells
C) Bacteria

Question

Quizplus · Accepted Answer

Restriction enzymes are mainly found in bacteria. They are part of the bacteria's defense mechanism against invading viruses, and are used to cut up the viral DNA. Scientists have isolated these enzymes from various species of bacteria and use them for many applications in molecular biology, such as DNA cloning and genetic engineering. Plant and human cells do not produce significant amounts of restriction enzymes.

________ Are a Major Source of Restriction Enzymes