An appropriate dNTP forms a hydrogen bond with an exposed base on the template strand. The next dNTP forms a bond between the 3' OH group of the 1st nucleotide and the 5' phosphate of the 2nd nucleotide. The enzyme responsible for catalyzing formation of this bond is:

DNA Polymerase.

Explanation:

DNA polymerase is an enzyme that is responsible for the production and synthesis of DNA from deoxyribonucleotides.

DNA polymerase is also involved in the replication process of DNA.

DNA polymerase exists in 3 forms: DNA Polymerase I , DNA Polymerase II, DNA Polymerase III.

DNA polymerase is responsible for catalyzing the reaction in the formation a bond between the 3' OH group of the 1st nucleotide and the 5' phosphate of the 2nd nucleotide.

did you fail the test? xd

the answer is b.) hydrogen bonds between bases.