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Lesson 1.2E Vocabulary Words

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Term
Definition
adenosine triphosphate (ATP)   (ATP) high-energy molecules used by the cell to synthesize macromolecules, such as carbohydrates and proteins  
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complementary base pairing   Complementary base pairing describes the manner in which the nitrogenous bases of the DNA molecules align with each other. Complementary base pairings are also responsible for the double-helix structure of DNA.  
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cytosine (C)   One of four nitrogen-containing bases in nucleotides composing the structure of DNA and RNA; pairs with guanine.  
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deoxyribonucleic acid (DNA)   is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses  
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double helix   describes the appearance of a DNA molecule  
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guanine (G)   Double spiral; describes the three-dimensional shape of DNA.  
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ribonucleic acid (RNA)   Nucleic acid produced from covalent bonding of nucleotide monomers that contain the sugar ribose; occurs in three forms: messenger RNA, ribosomal RNA, and transfer RNA.  
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nitrogenous base   is simply a nitrogen containing molecule that has the same chemical properties as a base. They are particularly important since they make up the building blocks of DNA and RNA: adenine, guanine, cytosine, thymine and uracil.  
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nucleic acids   there are two types of nucleic acids; DNA and RNA; both are polymers of nucleotides  
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nucleotide   composed of three main parts: a phosphate group (phosphoric acid), a pentose sugar (DNA contains the sugar deoxyribose and RNA contains the sugar ribose), and a nitrogen-containing base  
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phosphate   (PO43−) as an inorganic chemical is a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid.  
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thymine (T)   (T) One of four nitrogen-containing bases in nucleotides composing the structure of DNA; pairs with adenine.  
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uracil (U)   (U) One of four nitrogen-containing structures of RNA; pairs with adenine.  
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