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Assessment
What is the basic structure of DNA?
Double helix
Single strand
Triple helix
Circular shape
Which two bases are considered purines in DNA?
Cytosine and Thymine
Adenine and Guanine
Adenine and Uracil
Thymine and Uracil
What type of bond holds the two strands of the DNA double helix together?
Ionic bonds
Hydrogen bonds
Covalent bonds
Metallic bonds
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