Step 1: Understanding restriction enzymes.
Restriction enzymes are proteins that recognize specific DNA sequences and cut DNA at or near these sites.
Step 2: Meaning of digestion.
In molecular biology, digestion refers to breaking down DNA into smaller fragments using restriction enzymes. It does not refer to chemical degradation like in metabolism.
Step 3: Mechanism of action.
These enzymes bind to specific recognition sequences and cleave phosphodiester bonds in DNA strands.
Step 4: Application.
This cutting process is used in cloning, gene mapping, and recombinant DNA technology.
Step 5: Clarifying misconceptions.
It is not repair or incubation; it is precise cutting of DNA at specific sites.
Step 6: Final conclusion.
Thus, restriction enzyme digestion means cutting of DNA.