Can you explain why DNA must be replicated before mitosis and the role of helicase in DNA replication

1. dna needs to be replicated before mitosis so that the parent cell has the same amount of genetic material as the parent cell once it has split.

2. helicase is an enzyme that is so dna can unwind.

Explanation:

the explanation is in the answer.

I hope this helps!

DNA must be replicated before mitosis so that both identical daughter cells contain the same amount of genetic material as the parent cell once it has split in two. Helicase is an enzyme necessary at the initiation of DNA replication to unwind/unzip the DNA so that this process may begin.

i'd say that the moon rock is about 2.2 billion years old.

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.