Chapter 2 Crossword (Includes terms from Chapter 1)

2. Single sugar molecule
4. Change over time.
5. Large macromolecule formed from monosaccharides.
6. An element that has a different number of neutrons than other elements of the same type.
10. Compound made up of carbon, hydrogen, and oxygen. Major source of energy for living organisms.
11. Protein that acts as a biological catalyst.
19. Smallest unit of a compound.
20. Reactant of an enzyme-catalyzed reaction.
21. Macromolecule containing carbon, hydrogen, oxygen, nitrogen, and phosphorus.
22. Single-stranded nucleic acid that contains the sugar ribose.
26. Macromolecule that is made up of carbon, hydrogen, oxygen, and nitrogen.
27. A large compound formed from combinations of many monomers.
28. Monomer of proteins. Compound of amino group, carboxyl group, and an R-group.
32. A substance that speeds up the rate of a chemical reaction.
33. Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes.
34. Attraction of molecules of the same substance.
35. Basic unit of life. Collection of living matter enclosed by a barrier that separates the cell from its surroundings.
36. Attraction of molecules of different substances.
39. An element or compound that is produced by a chemical reaction.
40. Center of the atom that contains the neutrons and protons.
41. Monomer of nucleic acids. Composed of a 5-carbon sugar, nitrogenous base, and a phosphate group.

1. Double-stranded nucleic that contains the sugar deoxyribose.
3. Process where a single parent reproduces by itself.
7. A bond formed when electrons are transferred.
8. Small unit that can join together with other small units to form polymers.
9. Substance consisting of one type of atom.
12. System used to indicate the concentration of hydrogen ions
13. Process that changes one set of chemicals into a different set.
14. Process in which a cell from two parents unite to create a new organism.
15. A substance combined of two or more elements.
16. Negatively charged particle.
17. Compound that produces hydroxide ions in solution.
18. An element or compound that enters into a chemical reaction.
23. Process by which organisms maintain a stable internal environment.
24. Energy needed to start a chemical reaction.
25. Macromolecule made up of carbon and hydrogen. Fats, oils, and waxes.
29. An atom that has a charge.
30. Basic unit of matter.
31. Compound that forms hydrogen ions in a solution.
33. Material composed of two or more elements that is not chemically bonded.
35. A bond formed when electrons are shared.
37. A signal in which an organism responds.
38. A weak acid or base that helps prevent sharp, sudden changes in pH.