1. Chapter 2
Review

2. What happens when sodium hydroxide dissolves in water?
It releases hydrogen ions
It releases hydroxide ions
(c) It turns into a salt
(d) It becomes more concentrated

3. B It releases hydroxide ions

4. What is metabolism?
(a) all chemical changes that take place in an organism
(b) the way organisms store energy
(c) the way organisms release energy
(d) a control system

5. (a) all chemical changes that take place in an organism

6. Molecules that control inherited characteristics are called
nucleic acids
steriods
nitrogen molecules
lipids

7. A nucleic acids

8. The smallest particle of an element that has the element’s properties is a(n)
compound
molecule
atom
nucleus

9. C atom

10. Isotopes are atoms of the same element with the same number of protons and ?
a different number of electrons
a different number of molecules
(c) a different number of neutrons
(d) the same number of neutrons

11. (c) a different number of neutrons

12. What are molecules
units formed by ionic bonds
units formed by covalent bonds
compounds
pairs of negative ions

13. B units formed by covalent bonds

14. A substance with a pH of 11 is a(n)
acid
base
ion
salt

15. B Base

16. An atom that has an unstable nucleus is
Radioactive
not radioactive
(c) a molecule
(d) an ion

17. A Radioactive

18. Proteins that speed up the chemical reactions in a cell are called
Enzymes
Sites
(c) Casein
(d) a complex substance

19. A Enzymes

20. Fats, oils, and waxes are all
Foods
Carbohydrates
(c) human energy sources
(d) lipids

21. (d) lipids

22. Which of the following describes what happens during a chemical reaction?
balance sheet
reactant
(c) chemical equation
(d) formula

23. (c) chemical equation

24. During a chemical reaction, substances become new substance by the
(a) appearance of new isotopes
(b) breaking apart of atoms
(c) elimination of isotopes
(d) breaking or forming of chemical bonds

25. (d) breaking or forming of chemical bonds

26. Which of the following is not a basic function of proteins in living things?
energy storage
defense against disease
movement
nutrition

27. A energy storage

28. Which of the following is the dissolving substance in a solution?
solute
mixture
solvent
dissolvant

29. C solvent

30. Organisms use feedback loops to maintain
pheromones
homeostasis
metamorphosis
growth

31. B homeostasis

32. What are the building blocks of protein?
nucleic acids
enzymes
amino acids
bases

33. C amino acids

34. Which of the following chemicals do insects use to communicate?
honey
pollen
antibodies
pheromones

35. D pheromones

36. What are three particles that make up an atom?
Protons, Neutrons and isotopes
neutrons, isotopes and electrons
(c) positives, negatives, and electrons
(d) protons, neutrons and electrons

37. (d) protons, neutrons and electrons

38. The tendency to maintain a stable internal conditions

39. Homeostasis

40. Sum of all chemical reactions in a body

41. Metabolism

42. Two or more elements chemically bonded

43. Compound

44. A compound that releases Hydrogen ions in water

45. Acid

46. Types of Uranium with a different number of neutrons

47. Isotope

48. Uniform mixture

49. Solution

50. How do enzymes help maintain homeostasis

51. Final Question

52. Final question
How many amino acids are there.

53. 20

54. Differences and similarities of compounds.

55. Terms to know Ionic bond Hydrogen bond Covalent bond Amino Acid
Nucleic Acid
Chemical Reactions
pH scale