Download 1. Which term describes a molecule with electrons shared equally

Name: ____________________________________
Class: _____________
Date: _____________
Lesson Assessment: Chemistry of Biology
1. Which term describes a molecule with electrons shared equally among its atoms?
a) covalent
b) polar
c) nonpolar
d) ionic
2. In a molecule of water, the hydrogen atoms each share a pair of electrons with the oxygen atom. What type
of bonds are these?
a) covalent
b) ionic
c) nonpolar
d) hydrogen
3. In a hydrogen bond, slightly positive hydrogen atoms of one molecule attract slightly negative atoms of
another molecule. Given this information, what can you conclude about the molecules participating in a
hydrogen bond?
a) They are composed of isotopes.
b) They are polar.
c) They are nonpolar.
d) They are elements.
4. Which of the following functional groups belongs to an alcohol?
a) COOH
b) NH2
c) OH
d) CH3
5. Which type of organic compound is able to dissolve in water?
a) polar
b) wax
c) nonpolar
d) lipid
PAGE 1
Name: ____________________________________
Class: _____________
Lesson Assessment: Chemistry of Biology
6. Which compound is used by an organism for long term storage of energy?
a) lipid
b) protein
c) nucleic acid
d) carbohydrate
7. A triglyceride is an important class of lipid that is constructed from _____.
a) two glycerol molecules, a fatty acid molecule, and a phosphate group
b) three fatty acid molecules and a glycerol molecule
c) two fatty acid molecules, a glycerol molecule, and a phosphate group
d) three glycerol molecules and a fatty acid molecule
8. Which is a function of cholesterol?
a) It defends against heart disease.
b) It is used to synthesize hormones.
c) It is a major energy source.
d) It transports genetic information.
9. Which substance catalyzes chemical reactions and is usually a protein?
a) a peptide
b) an enzyme
c) a substrate
d) an amino acid
10. How do lipids compare to carbohydrates?
a) Lipids have more mass per chemical unit than carbohydrates do.
b) Lipids are used for energy storage and carbohydrates are not.
c) Lipids produce more energy per gram than carbohydrates do.
d) Lipids contain more oxygen atoms than carbohydrates do.
PAGE 2
Date: _____________
ANSWER KEY
1. c
2. a
3. b
4. c
5. a
6. a
ANSWER KEY Page 1
7. b
8. b
9. b
10. c