Test Bank for Biochemistry: The Molecular Basis of Life 7e Trudy McKee, James McKee||ISBN:9780190847685

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Test Bank for Biochemistry: The Molecular Basis
of Life 7e Trudy McKee, James McKee
CHAPTER ONE
BIOCHEMISTRY: AN INTRODUCTION

1) The ultimate source of energy for life on earth is .

A) The sun
B) Geothermal heat
C) Carbohydrates
D) Fats
E) Other organisms
M
Ans A
ED
2) Which of the following is not a common component of biomolecules?

A) Carbon
B) Hydrogen
C) Oxygen
D) Nitrogen
ST
E) Chlorine

Ans E

3) Which of the following is the basic structural unit of living organisms?
U

A) Nucleus
B) Cell membrane
D
C) Tissue
D) Cell
E) Cytoskeleton
Y

Ans D

4) Which of the following is not an organelle?

A) Mitochondria
B) Chloroplast
C) Nucleus
D) Plasma membrane
E) Golgi complex

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Ans D


5) Which of the following is not a role played by carbohydrates in living cells?

A) Energy source
B) Structural support
C) Intercellular communication
D) Both A and B are correct
E) All are roles played by carbohydrates in living cells

Ans D

6) Metabolism is best defined as the .
M
A) Reactions of living cells
B) Reactions that synthesize large molecules in living cells
C) Reactions that degrade molecules in living cells
ED
D) Conversion of food molecules to energy
E) Reactions that synthesize and degrade molecules in living cells

Ans E

7) The average life span of a species is about years
ST

A) One million
B) Ten million
C) Five hundred thousand
D) Five million
U
E) One hundred thousand

Ans A
D

8) Which of the following is not a waste product of living organisms
Y

A) Carbon dioxide
B) Water
C) Urea
D) Ammonia
E) Glycine

Ans E


9) Biochemistry is defined as

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A) The study of life processes
B) The study of the molecular basis of life
C) The study of living organisms
D) The study of organic compounds in living organisms
E) The study of living compounds

Ans B

10) One of the principal methods that organisms use to obtain energy from chemical
bonds is by .

A) Substitution reactions
B) Dehydration reactions
C) Oxidation/reduction reactions
M
D) Hydration reactions
E) Addition reactions
ED
Ans C

11) The following is an example of which reaction class?

CH3Br + HSCH2CH(NH2)COOH  CH3SCH2CH(NH2)COOH + Br- + H+
ST
A) Substitution
B) Elimination
C) Addition
D) Isomerization
E) Oxidation/Reduction
U
Ans A
D
12 The following is an example of which reaction class

HOOCCH=CHCOOH + H2O  HOOCCH2CH(OH)COOH
Y
A) Substitution
B) Elimination
C) Addition
D) Isomerization
E) Oxidation/Reduction

Ans C


13) The following is an example of which reaction class?

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CH3CH2OH  CH3CHO + H2O

A) Substitution
B) Elimination
C) Addition
D) Isomerization
E) Oxidation/Reduction

Ans E


14) Which of the following is not a component of nucleic acid?

A) Nucleotides
M
B) Glucose
C) Phosphate group
D) Purines
ED
E) Pyrimidines

Ans B


15) The largest molecules in living organisms are .
ST

A) proteins
B) lipids
C) nucleic acids
D) carbohydrates
U
E) steroids

Ans C
D

16) All of the following classes of compounds are lipids except .
Y
A) fats
B) sterols
C) fatty acids
D) phosphoglycerides
E) nucleotides

Ans E


17) Which of the following classes of biomolecules are the most abundant in nature?