,TESTBANK For Essential Biochemistry 5th
Edition Charlotte W. Pratt
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,Essential Biochemistry Test Bank, Chapter 1: The Chemical Basis of Life
Question type: Multiple Choice
1) Which of the following is the most abundant element in the human body?
A) nitrogen
B) carbon
C) oxygen
D) phosphorous
E) none of the above
Answer: B
Difficulty: Easy
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
2) Of the following amino acids, which contains an alcohol?
a b c d
A) a
B) b
C) c
D) d
E) all of the above
Answer: A
Difficulty: Easy
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
3) Which of the major types of biomolecules is never found in a polymeric form?
A) amino acids
B) carbohydrates
C) nucleotides
,D) lipids
E) none of the above
Answer: D
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
4) Which of the following biopolymers is correctly paired with the bond that forms between the
monomers?
A) protein: ester bond
B) polysaccharide: glycosidic bond
C) DNA: phosphate bond
D) RNA: phosphate bond
E) all of the above
Answer: B
Difficulty: Hard
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
5) Which of the biopolymers is correctly paired with its major function?
A) protein: information encoding
B) nucleic acids: energy storage
C) lipids: information encoding
D) polysaccharide: energy storage
E) none of the above
Answer: D
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
6) What functional groups are present in the following molecule?
,A) amine and carboxylic acid
B) amine, ketone and carboxylic acid
C) amine, amide and carboxylic acid
D) alcohol, amine, amide and carboxylic acid
E) none of the above are correct
Answer: C
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
7) Which elements are found in simple carbohydrates?
A) carbon, hydrogen and oxygen
B) carbon, hydrogen, oxygen and nitrogen
C) carbon, hydrogen, oxygen and phosphorous
D) carbon, hydrogen, oxygen and sulfur
E) none of the above
Answer: A
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
8) Entropy is used to measure _____.
A) free energy
B) heat content
C) temperature
D) randomness
E) all of the above
Answer: D
Difficulty: Easy
,Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
9) A spontaneous process always has _____.
A) DG < 0
B) DG > 0
C) DH < 0
D) DH > 0
E) none of the above
Answer: A
Difficulty: Easy
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
10) If a reaction at 37°C has a DH of 23 kJ/mol and a DS of 337 J/K·mol, what is the DG for the
reaction?
A) 65 kJ/mol
B) -47 kJ/mol
C) 18 kJ/mol
D) -19 kJ/mol
E) none of the above
Answer: B
Difficulty: Hard
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
11) An exergonic process _____.
A) occurs without the addition of free energy
B) has a DG < 0
C) is spontaneous
D) will have more products than reactants at equilibrium
E) all of the above
Answer: E
,Difficulty: Medium
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
12) Which of the following molecules contains the most oxidized form of carbon?
A) acetaldehyde
B) ethanol
C) acetic acid
D) ethylene
E) carbon dioxide
Answer: E
Difficulty: Easy
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
13) If the following two reactions were coupled, what would be the DG for the overall exergonic
reaction?
ATP + H2O ® ADP + Pi DG = -31 kJ/mol
Glucose + Pi ® glucose-1-phosphate + H2O DG = 21 kJ/mol
A) -52 kJ/mol
B) -10 kJ/mol
C) 10 kJ/mol
D) 52 kJ/mol
E) none of the above
Answer: B
Difficulty: Medium
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
14) A gaseous mixture of hydrogen, water, ammonia and methane can produce which of the
biomolecules when exposed to an electrical discharge (such as lightning)?
A) carbohydrates
B) nucleotides
C) lipids
,D) amino acids
E) none of the above
Answer: D
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
15) Which of the following explains how nucleotides might have polymerized into nucleic acids
in the prebiotic world?
A) a mixture of hydrogen cyanide, formaldehyde and phosphate can form nucleotides in the
presence of an electrical discharge
B) nucleotides formed short polymers in the high temperatures of hydrothermal vents
C) nucleotides used the surface of clay as a catalyst to form polymers
D) catalysts such as iron sulfide allow for the formation of new C—C bonds
E) all of the above
Answer: C
Difficulty: Hard
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
16) Photosynthetic organisms use energy from the sun to reduce _____ to _____.
A) formaldehyde; ethanol
B) CO2; ethanol
C) CO2; carbohydrates
D) CO2; oxygen
E) none of the above
Answer: C (both C and D may be correct based on the text on page 16)
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
17) The biological classification system categorizes organisms into which of the following
domains?
A) bacteria and eukarya
,B) prokarya and eukarya
C) archaea and eukarya
D) bacteria, eukarya and prokarya
E) bacteria, archaea and eukarya
Answer: E
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
18) Which of the following is a major difference between eukaryotic and prokaryotic cells?
A) eukaryotic cells contain a nucleus, prokaryotic cells do not
B) eukaryotic cells contain organelles, prokaryotic cells do not
C) eukaryotic cells are much larger than prokaryotic cells
D) eukaryotic cells often form multicellular organisms, prokaryotic cells do not
E) all of the above
Answer: E
Difficulty: Easy
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
19) The similarity of one organism to another (for example a bacteria versus a human) is most
easily done by comparing which biopolymer?
A) nucleic acids
B) polysaccharides
C) proteins
D) lipids
E) all of the above
Answer: A
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
20) Which of the following correctly identifies the progression from individual molecules to a
functioning multi-cellular organism?
, A) molecules, cell, organelle, organ, organism
B) molecules, organelle, organ, cell, organism
C) molecules, organelle, cell, organ, organism
D) molecules, organ, organelle, cell, organism
E) molecules, cell, organ, organelle, organism
Answer: C
Difficulty: Easy
Section Reference: 1-1
Learning Objective: Recognize the main themes of biochemistry
21) The biochemical principle that organisms acquire, transform, store, and use energy requires
that cells be able to ______.
A) produce their own energy
B) convert light into other forms of energy
C) extract heat from their environment
D) extract energy from their environment
E) use only one form of energy from their environment
Answer: D
Difficulty: Easy
Section Reference: 1-1
Learning Objective: Recognize the main themes of biochemistry
Question type: Text Entry
22) What are the four most common elements in biological systems? ___; ___; ___; ___
Answer 1: carbon
Answer 2: hydrogen
Answer 3: nitrogen
Answer 4: oxygen
Difficulty: Easy
Section Reference: 1-2
Edition Charlotte W. Pratt
Hello all ,
We have all what you need with best price
Our email :
Our website :
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,Essential Biochemistry Test Bank, Chapter 1: The Chemical Basis of Life
Question type: Multiple Choice
1) Which of the following is the most abundant element in the human body?
A) nitrogen
B) carbon
C) oxygen
D) phosphorous
E) none of the above
Answer: B
Difficulty: Easy
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
2) Of the following amino acids, which contains an alcohol?
a b c d
A) a
B) b
C) c
D) d
E) all of the above
Answer: A
Difficulty: Easy
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
3) Which of the major types of biomolecules is never found in a polymeric form?
A) amino acids
B) carbohydrates
C) nucleotides
,D) lipids
E) none of the above
Answer: D
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
4) Which of the following biopolymers is correctly paired with the bond that forms between the
monomers?
A) protein: ester bond
B) polysaccharide: glycosidic bond
C) DNA: phosphate bond
D) RNA: phosphate bond
E) all of the above
Answer: B
Difficulty: Hard
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
5) Which of the biopolymers is correctly paired with its major function?
A) protein: information encoding
B) nucleic acids: energy storage
C) lipids: information encoding
D) polysaccharide: energy storage
E) none of the above
Answer: D
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
6) What functional groups are present in the following molecule?
,A) amine and carboxylic acid
B) amine, ketone and carboxylic acid
C) amine, amide and carboxylic acid
D) alcohol, amine, amide and carboxylic acid
E) none of the above are correct
Answer: C
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
7) Which elements are found in simple carbohydrates?
A) carbon, hydrogen and oxygen
B) carbon, hydrogen, oxygen and nitrogen
C) carbon, hydrogen, oxygen and phosphorous
D) carbon, hydrogen, oxygen and sulfur
E) none of the above
Answer: A
Difficulty: Medium
Section Reference: 1-2
Learning Objective: Identify the major classes of biological molecules
8) Entropy is used to measure _____.
A) free energy
B) heat content
C) temperature
D) randomness
E) all of the above
Answer: D
Difficulty: Easy
,Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
9) A spontaneous process always has _____.
A) DG < 0
B) DG > 0
C) DH < 0
D) DH > 0
E) none of the above
Answer: A
Difficulty: Easy
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
10) If a reaction at 37°C has a DH of 23 kJ/mol and a DS of 337 J/K·mol, what is the DG for the
reaction?
A) 65 kJ/mol
B) -47 kJ/mol
C) 18 kJ/mol
D) -19 kJ/mol
E) none of the above
Answer: B
Difficulty: Hard
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
11) An exergonic process _____.
A) occurs without the addition of free energy
B) has a DG < 0
C) is spontaneous
D) will have more products than reactants at equilibrium
E) all of the above
Answer: E
,Difficulty: Medium
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
12) Which of the following molecules contains the most oxidized form of carbon?
A) acetaldehyde
B) ethanol
C) acetic acid
D) ethylene
E) carbon dioxide
Answer: E
Difficulty: Easy
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
13) If the following two reactions were coupled, what would be the DG for the overall exergonic
reaction?
ATP + H2O ® ADP + Pi DG = -31 kJ/mol
Glucose + Pi ® glucose-1-phosphate + H2O DG = 21 kJ/mol
A) -52 kJ/mol
B) -10 kJ/mol
C) 10 kJ/mol
D) 52 kJ/mol
E) none of the above
Answer: B
Difficulty: Medium
Section Reference: 1-3
Learning Objective: Explain how enthalpy, entropy, and free energy apply to biological systems
14) A gaseous mixture of hydrogen, water, ammonia and methane can produce which of the
biomolecules when exposed to an electrical discharge (such as lightning)?
A) carbohydrates
B) nucleotides
C) lipids
,D) amino acids
E) none of the above
Answer: D
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
15) Which of the following explains how nucleotides might have polymerized into nucleic acids
in the prebiotic world?
A) a mixture of hydrogen cyanide, formaldehyde and phosphate can form nucleotides in the
presence of an electrical discharge
B) nucleotides formed short polymers in the high temperatures of hydrothermal vents
C) nucleotides used the surface of clay as a catalyst to form polymers
D) catalysts such as iron sulfide allow for the formation of new C—C bonds
E) all of the above
Answer: C
Difficulty: Hard
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
16) Photosynthetic organisms use energy from the sun to reduce _____ to _____.
A) formaldehyde; ethanol
B) CO2; ethanol
C) CO2; carbohydrates
D) CO2; oxygen
E) none of the above
Answer: C (both C and D may be correct based on the text on page 16)
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
17) The biological classification system categorizes organisms into which of the following
domains?
A) bacteria and eukarya
,B) prokarya and eukarya
C) archaea and eukarya
D) bacteria, eukarya and prokarya
E) bacteria, archaea and eukarya
Answer: E
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
18) Which of the following is a major difference between eukaryotic and prokaryotic cells?
A) eukaryotic cells contain a nucleus, prokaryotic cells do not
B) eukaryotic cells contain organelles, prokaryotic cells do not
C) eukaryotic cells are much larger than prokaryotic cells
D) eukaryotic cells often form multicellular organisms, prokaryotic cells do not
E) all of the above
Answer: E
Difficulty: Easy
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
19) The similarity of one organism to another (for example a bacteria versus a human) is most
easily done by comparing which biopolymer?
A) nucleic acids
B) polysaccharides
C) proteins
D) lipids
E) all of the above
Answer: A
Difficulty: Medium
Section Reference: 1-4
Learning Objective: Summarize the evolutionary history of cells
20) Which of the following correctly identifies the progression from individual molecules to a
functioning multi-cellular organism?
, A) molecules, cell, organelle, organ, organism
B) molecules, organelle, organ, cell, organism
C) molecules, organelle, cell, organ, organism
D) molecules, organ, organelle, cell, organism
E) molecules, cell, organ, organelle, organism
Answer: C
Difficulty: Easy
Section Reference: 1-1
Learning Objective: Recognize the main themes of biochemistry
21) The biochemical principle that organisms acquire, transform, store, and use energy requires
that cells be able to ______.
A) produce their own energy
B) convert light into other forms of energy
C) extract heat from their environment
D) extract energy from their environment
E) use only one form of energy from their environment
Answer: D
Difficulty: Easy
Section Reference: 1-1
Learning Objective: Recognize the main themes of biochemistry
Question type: Text Entry
22) What are the four most common elements in biological systems? ___; ___; ___; ___
Answer 1: carbon
Answer 2: hydrogen
Answer 3: nitrogen
Answer 4: oxygen
Difficulty: Easy
Section Reference: 1-2
