BIO Genetic help?

Posted on 2015-09-08 05:45:00 in Biology by MARK

1. The main application of PCR is to___:
a.make many copies of single stranded DNA from double stranded DNA
b.make many copies of a DNA fragment originally present in very small amounts
c.amplify all the DNA present in a mixture of DNA molecules
d.reorganize the single strands of DNA originally present in one set of double-stranded molecules into another set of very different double-stranded molecule

Is this one B? i am stuck between B and C, but i think it is B because you don't need to amplify all DNA present, just a partial, right?

2. What substrates are used in the PCR to synthesize the DNA?
a.NTPs
b.dNDPs
c.dNTPs
d.dNMPs

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