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What is DNA?
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DNA
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DNA DNA stands for - Deoxyribose Nucleic Acid
Building blocks of DNA are nucleotides
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There are 3 main parts to nucleotides
1. Nitrogenous Base 2. Deoxyribose Sugar 3. Phosphate Group
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4 types of bases in DNA Guanine Adenine Cytosine Thymine
Nitrogenous Bases 4 types of bases in DNA Guanine Adenine Cytosine Thymine
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Purines vs Pyrimidines
Purines are more complex and have an extra group on the nitrogenous base Examples of Purines are Adenine Guanine
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Pyrimidines are simple and only have one group on their nitrogenous base
Examples of Pyrimidines Thymine Cytosine
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Base Pairing Only specific bases pair together Adenine always pairs with Thymine Guanine always pairs with Cytosine AT or TA GC or CG
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The backbone of the DNA is the Deoxyribose and Phosphate group
The middle of the DNA is the nitrogenous bases
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Deoxyribose sugar and phosphate group
Nitrogenous Bases
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The phosphate of one group binds to the deoxyribose sugar of the next group
The nitrogenous bases are held together by hydrogen bonds
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