Recombinant DNA
Bacterial cells protect their own DNA from degradation by restriction endonucleases by

not producing any restriction endonucleases
methylating the DNA at the sites that the enzyme recognizes
deleting all recognition sites from the genome
having anti restriction endonucleases

ANSWER DOWNLOAD EXAMIANS APP

Recombinant DNA
The Southern blotting technique depends on

the molecular mass of proteins
similarities between the sequences of probe RNA and experimental RNA
similarities between the sequences of probe protein and experimental protein
similarities between the sequences of probe DNA and experimental DNA

ANSWER DOWNLOAD EXAMIANS APP