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Multiple Choice Questions
1. The ____ contain the genetic information for the body.
A. carbohydrates
B. lipids
C. nucleic acids
D. proteins
2. Which substances are the structural materials for building solid body parts?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
3. Which of the following is primarily used to make energy?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
4. A(n) ____ is composed of two or more atoms.
A. metabolism
B. molecule
C. ion
D. electrolyte
5. What is the overall chemical functioning of the body?
A. Metabolism
B. Molecule
C. Anabolism
D. Catabolism
Chapter 2 Concepts of Chemistry
2-2
6. Molecules are composed of:
A. at least ten atoms.
B. at least two atoms.
C. two compounds.
D. water and one other atom.
7. An element is any substance that contains one type of:
A. molecule.
B. isotope.
C. atom.
D. proton.
8. The positively charged particles in the nucleus of an atom are:
A. neutrons.
B. electrons.
C. protons.
D. isotopes.
9. Which of the following subatomic particles are found in the nucleus of an atom?
A. Protons and electrons
B. Electrons and neutrons
C. Protons and shells
D. Neutrons and protons
10. The number of protons in an atom is called the:
A. atomic number.
B. atomic weight.
C. mass number.
D. combining weight.
Chapter 2 Concepts of Chemistry
2-3
11. Which subatomic particle determines the chemical activity of an atom?
A. Neutron
B. Proton
C. Electron
D. Prion
12. Different forms of the same element with different numbers of neutrons are called:
A. molecules.
B. compounds.
C. isotopes.
D. lattices.
13. If the atomic number of an element is 9 and the atomic weight is 19, how many neutrons
does the atom have?
A. 10
B. 9
C. 19
D. 28
14. Atoms bonded together to form a chemical unit are called
A. molecules.
B. ions.
C. radioisotopes.
D. buffers.
15. A molecule made of two or more different atoms bonded together is called a(an):
A. ion.
B. isotope.
C. atom.
D. compound
