IB Biology SL A1.2 - Nucleic Acids

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Definitions of key terms

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7 Terms

1
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What are the possible bases for DNA?

Adenine, Thymine, Guanine, Cytosine

2
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What are the possible bases for RNA?

Adenine, Uracil, Guanine, Cytosine

3
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What are the 3 components of a nucleic acid?

A nitrogenous base, a sugar, and a phosphate group.

4
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What is the difference between ribose sugar and deoxyribose sugar?

Ribose sugar has a hydroxyl group (-OH) on the second carbon, while deoxyribose sugar lacks this hydroxyl group, having only a hydrogen atom at that position.

5
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What are the purines?

Adenine and Guanine

6
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What are the pyrimidines?

Cytosine, Thymine and Uracil

7
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What are the complementary base pairings?

Adenine and Thymine (DNA), Adenine and Uracil (RNA), Guanine and Cytosine (DNA + RNA)