Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of dna into the bacteria's dna that prevents it from producing lactic acid. what is the new dna called?

a. foreign dna

b. restriction dna

c. recombinant dna

d. transgenic dna

Correct C) Recombinant DNA  

Recombinat DNA also called as rDNA is the DNA that is made by the combination of two DNA strands artificially. In this method DNA strand from the two species is taken by using restriction enzyme and is glued by using ligase enzyme.

Then the recombinant DNA is introduced in the bacteria like E.coli to make multiple copy of recombinant DNA.

Then a plasmid vector is used to transfer this recombinant DNA in to host organism. The different method which is used to produce recombinant DNA include transformation and phage introduction.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

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