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DNA is a polymeric molecule i.e made up of many building blocks called monomers. What is the monomeric unit called and how many different monomers are there
Nucleotides. Billions make up a strand but there are only four nucleotides (adenine, thymine, cytosine, and guanine)
State the main structural difference between purine and pyrimidine bases
Purines are double ringed and pyrimidines are single ringed
Explain why a purine must be paired with a pyrimidine in the DNA double helix
The molecular distance from Adenine combined with Thymine is the same as the molecular distance from Guanine combined with Cytosine. This gives a uniform distance that can fill up the center of the helix
Explain what is meant by the anti-parallel arrangement in the DNA double helix
One strand (leading)is 5' to 3' and the other strand (lagging) is 3' to 5'. They are concurrent
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