Biomolecules Test Review

Name: ______Date: ______Block: ______

Chapter 2Test Review

Fill in the blanks with the correct biomolecule: protein, lipid, carbohydrate, nucleic acid.

1. ______Used by the body for long term energy.
2. ______Contains carbon, hydrogen, oxygen, and nitrogen
3. ______Two types are monosaccharides and disaccharides.
4. ______Used by the body for quick energy.
5. ______Contains carbon, hydrogen, oxygen, nitrogen, and phosphorus.
6. ______Used by the body for insulation.
7. ______An example is an enzyme.
8. ______Tuna and other meats contain much of this.
9. ______Pasta contains much of this.
10. ______Stores information in your cells in the form of a code.
11. ______Building block in an amino acid.
12. ______Butter contains much of this.
13. ______Used in the exoskeleton of insects.
14. ______Helps transport oxygen in blood.
15. ______Can be used in murder trials.
16. ______Building block is a glycerol with three fatty acids
17. ______Made of nucleotides
18. ______DNA and RNA are examples.

19. Label the following compounds as organic or inorganic.

______C6H12O6 ______H2O ______CO2

______CH4 ______NH3 ______H2O2

20. Identify the biomolecule shown below.

a. ______b. ______

c. ______d. ______

Enzymes

21. What is the function of an enzyme? ______

22. What does it mean to catalyze a chemical reaction? ______

23. What happens to an enzyme if you overheat or change its pH? ______

24. True or False: Enzymes regulate most chemical reactions or activities in the body.

25. What category of biomolecules are enzymes? ______

Water

26. What is the pH of an acid? ______What is the pH of a base? ______

27. What is the pH of a neutral?______What is the pH of pure water? ______

28. Which is the stronger acid: pH 5 or pH 1? Why? (refer to the amount of H+ or OH- ions!) ______

29. Which is the stronger base: pH 8 or pH 9? Why? (refer to the amount of H+ or OH- ions!) ______

30. Draw two water molecules. Label the hydrogen bond and explain water’s polarity below.

______

31. Why don’t lakes freeze solid? ______

32. What happens to the water in your body when you are hot? How does this help you? ______

33. Water is the universal solvent. What does this mean? ______

34. Differentiate between capillary action, cohesion, and adhesion. ______

Chemistry:

35. Use the periodic table of elements to complete the chart below.

Match the correct term with the description. Answers may be used more than once.

_____36. bonds formed when electrons are shareda. peptide

_____37. bonds formed when electrons are transferred between atomsb. covalent

_____38. bonds formed between water molecules, creating cohesion/adhesionc. ionic

_____39. bonds formed between the hydrogen and oxygen atoms in a water moleculed. hydrogen

_____40. bonds holding the amino acids together in proteinse. van der Waals

_____41. attraction allowing the gecko’s feet to climb vertical surfaces

Review:

42. Differentiate between an observation and an inference. ______

______

Carmen is a long distance runner and wants to determine which food will give her the most energy. She

monitors her times over a three week period. For every race she runs one mile, at the same time of day,

in the same weather conditions. Her data is shown below:

43. What is the independent variable in this experiment? ______

44. What is the dependent variable in this experiment? ______

45. List 3 constants in this experiment. ______

46. List the 8 characteristics of life

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