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
aAnswer:
aA aTopic:
a 2.2
Skill: aRemembering/Understanding
aLearning aOutcome: a 2.1
Global aLO: a 5

7) In asome aareas, afluoride ais aadded aduring athe amunicipal awater atreatment aprocess ain aorder ato ahelp
A) prevent agoiter.
B) prevent athe agrowth aof abacteria.
C) prevent athe adevelopment aof amental aretardation.
D) reduce atooth
adecay. aAnswer: a D
Topic: a 2.2
Skill:
a Remembering/Understanding
aLearning aOutcome: a 2.1
Global aLO: a 5

8) Which aof athe afollowing aparticles aare afound ain athe anucleus aof aan aatom?
A) protons aand aneutrons
B) protons aand aelectrons
C) neutrons aand aelectrons
D) neutrons, aelectrons, aand
aprotons aAnswer: a A
Topic: a 2.3
Skill:
a Remembering/Understanding
aLearning aOutcome: a 2.2

, 9) Electrons amove aabout athe anucleus aof aan aatom ain athe asame away athat
A) insects afly aaround aa abright alamp aat anight.
B) cars aare aparked aalong athe asides aof aa astreet.
C) boats across aa alake.
D) birds amigrate ato aa anew awinter
ahome. aAnswer: a A
Topic: a 2.3
Skill: a Applying/Analyzing
aLearning aOutcome: a 2.2
Global aLO: a 2

10) What ais athe aatomic amass aof aan aatom athat ahas a6 aprotons, a6 aneutrons, aand a6 aelectrons?
A) 6
B) 8
C) 12
D) 18
Answer: a C
aTopic: a 2.3
Skill: a Applying/Analyzing
aLearning aOutcome: a 2.2
Global aLO: a 2, a4

11) An auncharged aatom aof aboron ahas aan aatomic anumber aof a5 aand aan aatomic amass aof
a11. aHow amany aelectrons adoes aboron ahave?
A) 11
B) 15
C) 5
D) 2
Answer: a C
aTopic: a 2.3
Skill: a Applying/Analyzing
aLearning aOutcome: a 2.2
Global aLO: a 2

12) The asodium aatom acontains a11 aelectrons, a11 aprotons, aand a12 aneutrons. aWhat ais
athe amass anumber aof asodium?
A) 11
B) 22
C) 23
D) 34
Answer: a C
aTopic: a 2.3
Skill: a Applying/Analyzing
aLearning aOutcome: a 2.2
Global aLO: a 2, a4