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
fAnswer:
fA fTopic:
f 2.2
Skill: fRemembering/Understanding
fLearning fOutcome: f 2.1
Global fLO: f 5

7) In fsome fareas, ffluoride fis fadded fduring fthe fmunicipal fwater ftreatment fprocess fin forder fto fhelp
A) prevent fgoiter.
B) prevent fthe fgrowth fof fbacteria.
C) prevent fthe fdevelopment fof fmental fretardation.
D) reduce ftooth
fdecay. fAnswer: f D
Topic: f 2.2
Skill:
f Remembering/Understanding
fLearning fOutcome: f 2.1
Global fLO: f 5

8) Which fof fthe ffollowing fparticles fare ffound fin fthe fnucleus fof fan fatom?
A) protons fand fneutrons
B) protons fand felectrons
C) neutrons fand felectrons
D) neutrons, felectrons, fand
fprotons fAnswer: f A
Topic: f 2.3
Skill:
f Remembering/Understanding
fLearning fOutcome: f 2.2

, 9) Electrons fmove fabout fthe fnucleus fof fan fatom fin fthe fsame fway fthat
A) insects ffly faround fa fbright flamp fat fnight.
B) cars fare fparked falong fthe fsides fof fa fstreet.
C) boats fcross fa flake.
D) birds fmigrate fto fa fnew fwinter
fhome. fAnswer: f A
Topic: f 2.3
Skill: f Applying/Analyzing
fLearning fOutcome: f 2.2
Global fLO: f 2

10) What fis fthe fatomic fmass fof fan fatom fthat fhas f6 fprotons, f6 fneutrons, fand f6 felectrons?
A) 6
B) 8
C) 12
D) 18
Answer: f C
fTopic: f 2.3
Skill: f Applying/Analyzing
fLearning fOutcome: f 2.2
Global fLO: f 2, f4

11) An funcharged fatom fof fboron fhas fan fatomic fnumber fof f5 fand fan fatomic fmass fof f11.
fHow fmany felectrons fdoes fboron fhave?
A) 11
B) 15
C) 5
D) 2
Answer: f C
fTopic: f 2.3
Skill: f Applying/Analyzing
fLearning fOutcome: f 2.2
Global fLO: f 2

12) The fsodium fatom fcontains f11 felectrons, f11 fprotons, fand f12 fneutrons. fWhat fis fthe
fmass fnumber fof fsodium?
A) 11
B) 22
C) 23
D) 34
Answer: f C
fTopic: f 2.3
Skill: f Applying/Analyzing
fLearning fOutcome: f 2.2
Global fLO: f 2, f4