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Nucleic Acids
Biology 200 Lecture Notes
9
Biology
Undergraduate 2
07/20/2011

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Term
What is a nucleic acid?
Definition
A polymer of nucleotides that are each composed of a phosphate group, a sugar, and a nitrogenous base.
Term
What is a pyrimidine?
Definition
1-ring nitrogenous base (C, U, T).
Term
What is a purine?
Definition
2-ring nitrogenous base (A, G).
Term
What does the addition of a phosphate group do to a monomer?
Definition
Raises the potential energy.
Term
Is phosphate hydrolysis exergonic or endergonic?
Definition
Exergonic.
Term
Base pairs form with _______________ structure.
Definition
Antiparallel backbone
Term
What are two ways that the primary structure of RNA differs from that of DNA?
Definition
RNA contains uracil instead of thymine, RNA contains ribose instead of deoxyribose.
Term
The presence of ________ group on ribose makes RNA much more ________ and less ________ than DNA.
Definition
2' --OH; reactive; stable.
Term
In a nucleic acid, where is energy typically stored?
Definition
In triphosphates.
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