Campbell Biology: Concepts and Connections (9th Edition, Taylor et al.) – Complete Test Bank Guide 2025 Edition

Test Bank for Campbell Biology Concepts and Connections
9th Edition Taylor complete guide 2025

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9th Edition Taylor


Campbell Biology: Concepts and Connections, 9e (Taylor et al.)
Chapter 2 The Chemical Basis of Life

2.1 Multiple Choice Questions

1) The four most common elements in living organisms are
A) C, H, O, Fe.
B) C, H, O, Na.
C) C, H, O, N.
D) C, N, O, Na.
Answer: C
Topic: 2.1
Skill: Remembering/Understanding
Learning Outcome: 2.1

2) Which of the following is a trace element in the human body?
A) nitrogen
B) zinc
C) oxygen
D) hydrogen
Answer: B
Topic: 2.1
Skill: Remembering/Understanding
Learning Outcome: 2.1

3) Which of the following statements regarding matter is false?
A) All life is composed of matter.
B) All matter has mass.
C) All matter is composed of elements.
D) All matter exists in the form of compounds.
Answer: D
Topic: 2.1
Skill: Remembering/Understanding
Learning Outcome: 2.1

4) Which of the following statements best describes a compound?
A) A compound is a pure element.
B) A compound contains two or more different elements in a fixed ratio.
C) A compound is exemplified by sodium.
D) A compound is a solution.
Answer: B
Topic: 2.1
Skill: Remembering/Understanding
Learning Outcome: 2.1

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9th Edition Taylor


5) In the equation 2 H2 + O2 → 2 H2O,
A) H2, O2, and H2O are all compounds.
B) H2, O2, and H2O are all elements.
C) only H2O is a compound.
D) only H2 and O2 are compounds.
Answer: C
Topic: 2.1
Skill: Applying/Analyzing
Learning Outcome: 2.1
Global LO: 2

6) Which of the following trace elements needed by humans is commonly added to table salt?
A) iodine
B) iron
C) magnesium
D) fluoride
Answer: A
Topic: 2.2
Skill: Remembering/Understanding
Learning Outcome: 2.1
Global LO: 5

7) In some areas, fluoride is added during the municipal water treatment process in order to help
A) prevent goiter.
B) prevent the growth of bacteria.
C) prevent the development of mental retardation.
D) reduce tooth decay.
Answer: D
Topic: 2.2
Skill: Remembering/Understanding
Learning Outcome: 2.1
Global LO: 5

8) Which of the following particles are found in the nucleus of an atom?
A) protons and neutrons
B) protons and electrons
C) neutrons and electrons
D) neutrons, electrons, and protons
Answer: A
Topic: 2.3
Skill: Remembering/Understanding
Learning Outcome: 2.2

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9th Edition Taylor


9) Electrons move about the nucleus of an atom in the same way that
A) insects fly around a bright lamp at night.
B) cars are parked along the sides of a street.
C) boats cross a lake.
D) birds migrate to a new winter home.
Answer: A
Topic: 2.3
Skill: Applying/Analyzing
Learning Outcome: 2.2
Global LO: 2

10) What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?
A) 6
B) 8
C) 12
D) 18
Answer: C
Topic: 2.3
Skill: Applying/Analyzing
Learning Outcome: 2.2
Global LO: 2, 4

11) An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How
many electrons does boron have?
A) 11
B) 15
C) 5
D) 2
Answer: C
Topic: 2.3
Skill: Applying/Analyzing
Learning Outcome: 2.2
Global LO: 2

12) The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. What is the mass
number of sodium?
A) 11
B) 22
C) 23
D) 34
Answer: C
Topic: 2.3
Skill: Applying/Analyzing
Learning Outcome: 2.2
Global LO: 2, 4