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

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

,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

,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
dAnswer:
dA dTopic:
d 2.2
Skill: dRemembering/Understanding
dLearning dOutcome: d 2.1
Global dLO: d 5

7) In dsome dareas, dfluoride dis dadded dduring dthe dmunicipal dwater dtreatment dprocess din dorder dto dhelp
A) prevent dgoiter.
B) prevent dthe dgrowth dof dbacteria.
C) prevent dthe ddevelopment dof dmental dretardation.
D) reduce dtooth
ddecay. dAnswer: d D
Topic: d 2.2
Skill:
d Remembering/Understanding
dLearning dOutcome: d 2.1
Global dLO: d 5

8) Which dof dthe dfollowing dparticles dare dfound din dthe dnucleus dof dan datom?
A) protons dand dneutrons
B) protons dand delectrons
C) neutrons dand delectrons
D) neutrons, delectrons, dand
dprotons dAnswer: d A
Topic: d 2.3
Skill:
d Remembering/Understanding
dLearning dOutcome: d 2.2

, 9) Electrons dmove dabout dthe dnucleus dof dan datom din dthe dsame dway dthat
A) insects dfly daround da dbright dlamp dat dnight.
B) cars dare dparked dalong dthe dsides dof da dstreet.
C) boats dcross da dlake.
D) birds dmigrate dto da dnew dwinter
dhome. dAnswer: d A
Topic: d 2.3
Skill: d Applying/Analyzing
dLearning dOutcome: d 2.2
Global dLO: d 2

10) What dis dthe datomic dmass dof dan datom dthat dhas d6 dprotons, d6 dneutrons, dand d6 delectrons?
A) 6
B) 8
C) 12
D) 18
Answer: d C
dTopic: d 2.3
Skill: d Applying/Analyzing
dLearning dOutcome: d 2.2
Global dLO: d 2, d4

11) An duncharged datom dof dboron dhas dan datomic dnumber dof d5 dand dan datomic dmass dof
d11. dHow dmany delectrons ddoes dboron dhave?
A) 11
B) 15
C) 5
D) 2
Answer: d C
dTopic: d 2.3
Skill: d Applying/Analyzing
dLearning dOutcome: d 2.2
Global dLO: d 2

12) The dsodium datom dcontains d11 delectrons, d11 dprotons, dand d12 dneutrons. dWhat dis
dthe dmass dnumber dof dsodium?
A) 11
B) 22
C) 23
D) 34
Answer: d C
dTopic: d 2.3
Skill: d Applying/Analyzing
dLearning dOutcome: d 2.2
Global dLO: d 2, d4