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monitta
3 years ago
10

DNA replication results in two identical DNA molecules. What role do DNA helicases have in DNA replication?

Chemistry
2 answers:
PilotLPTM [1.2K]3 years ago
8 0
I'm pretty sure since one chemical can only bind with one other type, um, I think that one side of the DNA helicase helps make the other side?
arsen [322]3 years ago
5 0
DNA helicases break the hydrogen bonds in the DNA molecule

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What mass of F2 is needed to produce 180 g of PF3 if the reaction has a 78.1% yield?
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Answer:

91.26 g

Explanation:

Given data:

Mass of PF₃ = 180 g

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Solution:

Chemical equation:

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Moles of PF₃:

Number of moles = mass/ molar mass

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Number of moles = 2.05 mol

Now we will compare the moles of PF₃ with F₂.

                        PF₃            :           F₂

                          4               :           6

                          2.05         :           6/4×2.05 = 3.075

Mass of  F₂:

Mass of F₂ = moles × molar mass

Mass of F₂ = 3.075 mol × 38 g/mol

Mass of F₂ =  116.85 g

If reaction yield is 78.1%:

116.85 /100 ×78.1 = 91.26 g

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