Question

DNA from an organism can bBacteria that contain recombinant plasmids can be easily isolated because: Select one:
a. they are designed to be resistant to certain antibiotics
b. their colonies will be distinguished by a color variation from those colonies containing nonrecombinant plasmids
c. they are smaller than non-recombinant bacteria
d. they are larger than non-recombinant bacteriae incorporated into a vector using the enzyme

Answer 1

Answer:

a. they are designed to be resistant to certain antibiotics

Explanation:

Most of the Bacteria that contain recombinant plasmids as antibiotic-resistant gene. This antibiotic-resistant gene can be used as a selectable marker.

To isolate these bacteria, you will have to inoculate and grow them in a medium containing the antibiotic. Take for example, a recombinant plasmid which has an ampicillin-resistant gene is grown in an ampicillin antibiotic medium since other bacterias present won't be able to grow in the medium due to the lack of the ampicillin-resistant gene.