DNA is a double-stranded structure. The two strands are joined together by the formation of hydrogen bonds between complementary nucleotides. So before the replication takes place these two strands must be separated.

The separation of DNA strand is accomplished by the action of a helicase enzyme which breaks the hydrogen bond between complementary nucleotides and separated the two DNA strands.

After separation, the DNA polymerase binds to separated DNA and replicating the DNA. So the right answer is B.

4 0

3 years ago

6. What is one main human activity that causes smog, acid rain, and con-

Butoxors [25]

the main human activity is air pollution

6 0

3 years ago

There are places in America and other parts of the world where herds of wild horses live, well-adapted to the environment. If mu

Art [367]

simple mules are a mix of hourse and donky and are born infertle they cant BREED.

5 0