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Chemistry, bio and phys

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hello there, are there any resouces or Cd Rom or workbook for these subjects that can help me improve my grades?
 
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could you explain how the animation works? i would really appreciate it thnks
 
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I would have posted the link or uploaded it in the first place if I had one.

Animations not working?
 
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I don't know how to use it...
do you have any ebook for bio by any chance or worksheets?
 
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by the way do you have a similar one like cambridge biology ebook but this time it's for mechanics ^^ or just give me a link to download them
 
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In order to sequence the DNA of a gene, it is first denatured to separate its two strands.
Then, in the presence of a large supply of each of the four nucleotides, the single-stranded
DNA is replicated by DNA polymerase.
(a) Explain what determines the sequence of nucleotides in the newly replicated strand of
DNA.
 
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