In terms of parasites vs hosts, it is an organism in which the parasite resides and normally feeds + reproduces.
I would say d. Multi-part protein that reversibly binds to oxygen molecules (...)
Answer:
DNA and sugar and phosphate
DNA helicase is the enzyme that unwinds the DNA double helix by breaking the hydrogen bonds down the center of the strand. It begins at a site called the origin of replication, and it creates a replication fork by separating the two sides of the parental DNA.
Hope this helps!
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