PCR (polymerase chain reaction) is an excellent method of generating copies of target DNA. If a single piece of double stranded DNA (dsDNA) is put into a PCR machine, how many dsDNA segments will there be after 3 rounds?

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#Question id: 27081

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correctly describing the A dihedral angle or torsion angle 

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#Question id: 3634

#Unit 8. Inheritance Biology

In the pearl millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2 (purple), and Rp3 (green). Red is dominant over purple and green, and purple is dominant over green (Rp1 >Rp2 >Rp3). Which of the following parental cross would produce ½ had red, ¼ purple, ¼ green?

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#Question id: 1292

#Unit 4. Cell Communication and Cell Signaling

Heparan sulfate, an example of a(n) _____________, aids in the activation of ____________.

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#Question id: 8861

#Unit 9. Diversity of Life Forms

Which of the following is true of members of the phylum Cnidaria?

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#Question id: 32576

#Unit 2. Cellular Organization

Microtubules are generally nucleated from a specific intracellular location known as a microtubule-organizing center where: