7. What are the 4 nitrogen bases? 1. 2. 3. 4. 8. What is their purpose? Why does their order matter? Answer in complete sentences. How does this structure allow a DNA molecule to be copied to make another identical molecule? The answer to this ion is that the nitrogen bases interact with one another in predictable ways. Pairing between nitrogen bases on opposite strands is always the same. Notice that the pairing that takes place between nitrogen bases is specific in DNA strands. Adenine, a large base,

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Nucleotides

It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). 

Nucleic Acids

Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.