1. In humans, excess blood glucose is stored in the liver and in muscle tissue in the form of glycogen. Glycogen is a long chain of glucose molecules bonded together. Because of this, glycogen is called a ____.

• lipid
• polysaccharide
• protein
• monosaccharide

2. The process by which organisms maintain balanced internal conditions is called...

• homeostasis
• evolution
• metabolism
• photosynthesis

The number that precedes symbols and formulas in a chemical equation are

• catalyst
• coefficients
• superscripts
• subscripts.

The three particles that make up atoms are

• protons, neutrons, and isotopes.
• neutrons, isotopes, and electrons.
• positives, negatives, and neutrals.
• protons, neutrons, and electrons.

3. The three subatomic particles that make up atoms are...

• protons, neutrons, and isotopes.
• neutrons, isotopes, and electrons.
• positives, negatives, and neutrals.
• protons, neutrons, and electrons.

8. Sugars typically end in the letters...

• -ase
• -ice
• -ology
• -ose

9. Identify the macromolecule associated with the following monomer.

• carbohydrates
• lipids
• proteins
• nucleic acids

10. Enzymes typically end in the letters _______.

• -ase
• -ice
• -ology
• -ose

11. The human pancreas is an organ that plays an important role in the process of digestion. The pancreas secretes (releases) trypsin. Trypsin is an enzyme that breaks down proteins. Which statement BEST describes what occurs to the enzyme trypsin AFTER it digests (breaks down) a protein?

• The trypsin molecule is not chemically altered by the reaction and may be used again.
• After binding to a protein molecule, the trypsin molecule is destroyed and must be replaced.
• After binding to the protein molecule, trypsin is converted to a lipid and used for energy storage.

12. Which of the following is NOT a monomer?

• a glucose molecule
• an amino acid
• a nucleotide
• a polypeptide