| Term | Definition |
| nucleic acids | chains of nucleotides |
| nucleotides | made up of a five-carbon sugar (ribose or deoxyribose), a phosphate group, and a nitrogen containing base |
| deoxyribose | bonds to four types of nitrogen containing base: adenine, guanine, cytosine and thymine |
| ribose | bonds to four types of nitrogen containing base: adenine, guanine, cytosine, and uracil |
| two types of nucleic acid | deoxyribonucleic acid and ribonucleic acid |
| DNA | found in the chromosomes of all living things, it spells out the genetic information needed to construct the proteins of each organism |
| RNA | carries DNA genetic code from nucleus to cytoplasm and directs the synthesis of proteins |
| cyclic nucleotides | intracellular messengers that carry information from the plasma membrane to other molecules in the cell |
| cyclic adenosine monophosphate | synthesized when certain hormones come in contact with the plasma membrane, then it stimulates essential reactions in the cytoplasm or nucleus |
| adenosine triphosphate | unstable molecules that carry energy from place to place within a cell, capture energy where it is produced and give it up to drive energy-demanding reactions elsewhere |
| coenzymes | assist enzymes in their role of promoting and guiding chemical reactions |