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Which nitrogenous bases make up DNA nucleotides?
A. Adenine, thymine, guanine, and uracil.
B. Adenine, uracil, guanine and cytosine.
C. Adenine, thymine, uracil, and cytosine.
D. Adenine, thymine, guanine, and cytosine.
Adenine joins with thymine and guanine joins with cytocine in DNA molecules. Uracil is a nitrogenous base found only in RNA nucleotides.
 
 
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Added: 6/29/2008
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Biological Sciences III (non MCAT Format)
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While these questions do not fit the MCAT format (they have no related reading passages) they cover concepts one should understand in order to do well in the biological sciences portion of the MCAT.
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