1. The atomic weight of an atom
	A. equals the number of protons plus the number of neutrons.
	B. equals the number of protons plus the number of electrons.
	C. equals the number of neutrons.
	D. changes after each reaction.

2. An element can be easily identified if the number of __________ in an atom of that element is known.
	A. protons
	B. neutrons
	C. electrons
	D. isotopes
	E. None of the choices are correct.

3. If neutral atoms become positive ions, they
	A. gain electrons.
	B. lose electrons.
	C. gain protons.
	D. do not change.

4. The __________ structure of a protein consists of the sequence of the amino acids joined together by peptide bonds.
	A. primary
	B. secondary
	C. tertiary
	D. quaternary

5. Which of the following contains glucose?
	A. protein
	B. fat
	C. nucleic acid
	D. starch

6. Which of the following is not found in RNA?
	A. adenine
	B. thymine
	C. cytosine
	D. guanine
	E. None of the choices are correct.

7. Which of the following statements is correct regarding acids and bases?
	A. Acids increase the pH, and bases decrease the pH.
	B. Acids are harmful but bases are not harmful.
	C. Acids combine with bases to form water and salt.
	D. Acids combine with bases to form sugars.

8. Enzymes are organic compounds classified as
	A. nucleic acids.
	B. carbohydrates.
	C. lipids.
	D. steroids.
	E. proteins.