Question

Restriction enzymes:
weld together fragments of DNA
attach to DNA molecules at specific sites and cut both strands of DNA at that place
only cut RNA molecules at specific sites and cut both strands of DNA at that place
are chemical machines that make parts of the cell membrane.

Answer 1

Is this for bio?

Answer 2

yes

Answer 3

lol sorry got distracted in the history section. Its B.

Answer 4

thanks

Answer 5

Thanks, i needed this answer too. Haha