Question

Help with these two would be appreciated

JUVIJVVEL In a large unbiased random DNA sequence, how often would you expect a 6 base targeting site specific restriction enzyme to cut? O On average every 4096 base pairs (446) O Never O On average every 1.296 base pairs (6^4) O Every 6 base pairs QUESTION 5 2 points Save Answer How do bacteria possessing restriction systems avoid targeting and cutting their own DNA? By methylating their chromosomal DNA O By methylating foreigner DNA O Their chromosomes do not contain the recognition sequences targeted by the enzymes O They do not, but they pair the enzymes with repair systems to re-ligate any DNA breaks created

Answer 1

I) On average every 4096 base pairs(4^6)

(Because there are 4 possibilty at each position in a 6 base long restriction site)

II) By methylating their chromosomal DNA. (you are right)

(It helps in modification of DNA sequence which make it unrecognizable to restriction enzymes)

IF, IT WAS HELPFUL, GIVE A THUMPS UP. ALL THE BEST