Across
- 2. a group of molecules that includes sugars and starches, represent 1–2% of cell mass page 43.
- 3. The relative concentration of hydrogen ions in various body fluids is measured in concentration units called page 40.
- 4. an atom’s outermost energy level or that portion of it containing the electrons that are chemically reactive page 31.
- 6. a combination of two or more atoms held together by chemical bonds is called a page 28
- 7. Every chemical reaction requires that a certain amount of energy, called page 52.
- 9. are extended and strandlike some exhibitonly secondary structure, but most have tertiary or even quaternary structure as well page 50
- 10. are homogeneous mixtures of components that may be gases, liquids, or solids page 29.
- 15. of any atom is equal to the number of protons in its nucleus page 27
- 18. is stored energy, that is, inactive energy that has the potential, or capability, to do work but is not presently so page 24.
- 20. is the study of the chemical composition and reactions of living matter page 38.
- 25. contains protons and neutrons tightly bound together.
- 26. is anything that occupies space and has mass.Page 24
- 28. donor The reactant losing the electrons is referred to as the page 36.
- 30. is defined as the capacity to do work, or to put matter into motion page 24
- 31. are insoluble in water but dissolve readily in other lipids and in organic solvents such as alcohol and ether page 43.
- 32. have a bitter taste, feel slippery, and are proton acceptors that is, they take up hydrogen ions (H1) in detectable amounts page 39.
- 33. is the form stored in the bonds of chemical substances page 24.
- 36. is formed when two monosaccharides are joined by dehydration synthesis page 43.
- 37. is energy that travels in waves page 24.
- 39. have a sour taste, can react with (dissolve) many metals,and “burn” a hole in your rug page 39.
- 40. are substances that increase the rate of chemical reactions without themselves becoming chemically changed or part of the product page 38.
- 42. Electrons forming the electron cloud around the nucleus of an atom occupy regions of space called page 31.
- 47. The structural units of nucleic acids page 53.
- 48. Acids that do not dissociate completely, like carbonic acid (H2CO3) and acetic acid (HAc), are weak acids page 41.
- 49. acids that dissociate completely and irreversibly in water are called page 41.
- 50. are formed when atoms share electron pairs page 57.
- 51. are modified triglycerides page 47.
- 52. are globular proteins that act as biological catalysts page 51.
- 53. also called neutral fats, are commonly known as fats when solid or oils when liquid page 45.
Down
- 1. all cells contain a class of unrelated globular proteins called page 50.
- 5. results from the movement of charged particles page 24.
- 8. are heterogeneous mixtures with large, often visible solutes that tend to settle out page 30.
- 11. acids composed of carbon, oxygen, hydrogen,nitrogen, and phosphorus, are the largest molecules in the body page 53.
- 12. are diverse lipids chiefly derived from a 20-carbon fatty acid (arachidonic acid) found in all cell membranes page 47.
- 13. are polymers of simple sugars linked together by dehydration synthesis page 43.
- 14. are substances composed of two or more components physically intermixed page 29.
- 16. Homeostasis of acid-base balance is carefully regulated by the kidneys and lungs and by chemical systems (proteins and other types of molecules) called page 41.
- 17. unique substances that cannot be broken down into simpler substances by ordinary chemical methods page 25.
- 19. are compact, spherical proteins that have at least tertiary structure page 50.
- 21. an important base in the body,is particularly abundant in blood page 40.
- 22. Reactions that release energy are called page 37.
- 23. are single-chain or single-ring structures containing from three to seven carbon atoms page 43.
- 24. the sum of the masses of its protons and neutrons page 27.
- 27. The substance on which an enzyme acts is called a page 52.
- 29. are basically flat molecules made of four interlocking hydrocarbon rings page 47.
- 34. is energy directly involved in moving matter page 24.
- 35. substances that conduct an electrical current in solution page 39.
- 38. The building blocks of proteins are molecules page 47.
- 41. is an ionic compound containing cations other than H1 and anions other than the hydroxyl ion (OH2) page 39.
- 43. When two or more different kinds of atoms bind, they form molecules of a page 28.
- 44. bear a negative charge equal in strength to the positive charge of the proton page 25.
- 45. is a chemical bond between atoms formed by the transfer of one or more electrons from one atom to the other page 32.
- 46. have the same number of protons (and electrons), but differ in the number of neutrons they contain page 27