Question

question 18
why are enzymes needed in the process of dna replication?
they do not help the replication process.
they slightly alter the replication process.
they speed up the replication process.
they slow down the replication process.

Explanation:

Enzymes are biological catalysts. Catalysts speed up chemical reactions. DNA replication is a complex biochemical process. Enzymes like DNA polymerase, helicase etc. play crucial roles in facilitating and speeding up different steps of DNA replication. For example, helicase unwinds the double - helix structure of DNA quickly (a reaction that would be very slow without it), and DNA polymerase adds nucleotides to the growing DNA strand at a much faster rate than it would occur spontaneously.

Answer:

They speed up the replication process.