biomolecules

3. A substance that forms a chemical reaction
4. Adenosine triphosphate, an organic molecule that acts as the main energy source for cell processes
5. A fat molecule or a molecule that has similar properties, including waxes and steroids
6. An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge
10. The attractive force between two bodies of different substances that are in contact with each other
12. The reactant in reactions catalyzed by enzymes
13. The smallest unit of an element that maintains the chemical properties of that element
14. A class of molecules that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen
16. The force that holds molecules of a single material together
19. Any compound that increases the number of hydroxide ions when dissolved in water
20. The capacity to do work
22. A solution made from a weak acid and its conjugate base that neutralizes small amounts of acids or bases added to it
23. On an enzyme, the site that attaches to a substrate
27. The minimum amount of energy required to start a chemical reaction
28. A substance made up of atoms of two or more different elements joined by chemical bonds

1. Is a group of atoms that are held together by chemical forces
2. An organic compound, either RNA or DNA, whose molecules are made up of one or two chains of nucleotides and carry genetic information
4. A compound of a class of simple organic compounds that contain a carboxyl and an amino group and that combine to form proteins
7. An electron that is found in the outermost shell of an atom and that determines the atom's chemical properties
8. A value that is used to express the acidity and alkalinity (basicity) of a system
9. Deoxyribonucleic acid, the material that contains the information that determines inherited characteristics
11. An organic compound that is made of one or more chains of amino acids and that is a principle component of all cells
15. Ribonucleic acid, a natural polymer that is present in all living cells and that plays a role in protein synthesis
17. A substance that cannot be separated or broken down into simpler substances by chemical means
18. An organic compound that consists of a sugar, a phosphate, and a nitrogen base
21. Any compound that increases the number of hydronium ions when dissolved in water
24. A substance or molecule that participates in a chemical reaction
25. A homogeneous mixture throughout which two or more substances are uniformly dispersed
26. A molecule, either protein or RNA, that acts as a catalyst in biochemical reactions