AP Biology (Mader), 11th Edition

Chapter 2: Basic Chemistry

Pre-Test

1
Which of the following is NOT one of the six elements that make up 95% of the body weight of organisms?
A)Hydrogen
B)Nitrogen
C)Carbon
D)Iron
2
Which of the following statements is true?
A)All isotopes give off subatomic particles.
B)All isotopes are radioactive.
C)All isotopes have the same number of protons.
D)All isotopes have the same number of neutrons.
3
What type of bond is formed when atoms share electrons?
A)Ionic
B)Covalent
C)Hydrogen
4
Which of the following has a basic pH?
A)Lemon juice
B)Stomach antacids
C)Tomatoes
D)hydrochloric acid
5
Aquatic organisms are able to survive the winter due to which specific property of water?
A)It is less dense as a solid than as a liquid.
B)It is cohesive and adhesive.
C)It is the universal solvent.
D)It has a pH of 7.0.
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