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Which of the structures below corresponds to the dipeptide serylalanine? Note the following structures: Which of the structures below corresponds to the dipeptide serylalanine? Note the following structures: A) B) C) D)


A) Which of the structures below corresponds to the dipeptide serylalanine? Note the following structures: A) B) C) D)
B) Which of the structures below corresponds to the dipeptide serylalanine? Note the following structures: A) B) C) D)
C) Which of the structures below corresponds to the dipeptide serylalanine? Note the following structures: A) B) C) D)
D) Which of the structures below corresponds to the dipeptide serylalanine? Note the following structures: A) B) C) D)

E) A) and C)
F) All of the above

Correct Answer

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A peptide bond (also called an amide bond) joins two amino acids together.What atoms are linked by this bond?


A) C - O
B) C - H
C) C - N
D) N - S
E) S - C

F) A) and C)
G) B) and D)

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Which of the following describes a fat?


A) A group of molecules that contain both a carboxylic acid and amine functional group.
B) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
C) A group of small organic molecules that are insoluble in water.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A tri-ester of glycerol where each of the hydroxyl-group hydrogen atoms in glycerol has been replaced by the alkyl group of a relatively long hydrocarbon chain carboxylic acid.

F) A) and D)
G) A) and E)

Correct Answer

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E

Which of the following is a steroid?


A) Which of the following is a steroid? A) B) C) D) E)
B) Which of the following is a steroid? A) B) C) D) E)
C) Which of the following is a steroid? A) B) C) D) E)
D) Which of the following is a steroid? A) B) C) D) E)
E) Which of the following is a steroid? A) B) C) D) E)

F) None of the above
G) B) and C)

Correct Answer

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Which of the following refers to a primary structure?


A) The shape the protein chain adopts as the result of hydrogen bonding.
B) The sequence of amino acids that make up a protein chain.
C) The folding of a protein into a characteristic shape.
D) The shape formed by two or more folded protein chains coming together.
E) None of the above.

F) A) and B)
G) None of the above

Correct Answer

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Which of the following describes a lipid?


A) A group of molecules that contain both a carboxylic acid and amine functional group.
B) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
C) A group of small organic molecules that are insoluble in water.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A molecule that contains C, H, and N and exhibits Brønsted base behavior

F) C) and D)
G) B) and D)

Correct Answer

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C

Which of the following describes a protein?


A) A molecules composed of three small sugar molecules.
B) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
C) A large biological polymer composed of amino acids.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A tri-ester of glycerol where each of the hydroxyl-group hydrogen atoms in glycerol has been replaced by the alkyl group of a relatively long hydrocarbon chain carboxylic acid.

F) All of the above
G) C) and E)

Correct Answer

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Which of the following describes a steroid?


A) A group of molecules that have a special grouping of 5- and 6-member rings in common.
B) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
C) A large biological polymer composed of amino acids.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A group of molecules that make up a lipid bilayer.

F) B) and D)
G) C) and E)

Correct Answer

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Which of the following is not a carbohydrate?


A) C6H12O6
B) C5H10O5
C) C10H18O9
D) C6H14O6
E) C12H22O11

F) A) and E)
G) C) and E)

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Which of the following refers to a secondary structure?


A) The shape the protein chain adopts as the result of hydrogen bonding.
B) The sequence of amino acids that make up a protein chain.
C) The folding of a protein into a characteristic shape.
D) The shape formed by two or more folded protein chains coming together.
E) None of the above.

F) A) and B)
G) None of the above

Correct Answer

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Which of the following describes a triglyceride?


A) A molecules composed of three small sugar molecules.
B) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
C) A group of small organic molecules that are insoluble in water.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A tri-ester of glycerol where each of the hydroxyl-group hydrogen atoms in glycerol has been replaced by the alkyl group of a relatively long hydrocarbon chain carboxylic acid.

F) All of the above
G) None of the above

Correct Answer

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Phosphorus is an essential mineral element.It is an important atom in which one of the following?


A) Amino acids
B) Proteins
C) Polyethylene
D) Nylon
E) DNA

F) A) and B)
G) A) and C)

Correct Answer

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Which of the following describes a phospholipid?


A) A molecules composed of three small sugar molecules.
B) A diglyceride with an organic phosphate group in place of one of the fatty acids.
C) A relatively small, water-soluble molecule that contains either a ketone or an aldehyde functional group.
D) And ester of phosphoric acid where one or more of the ionizable hydrogen atoms has been replaced by an R group.
E) A tri-ester of glycerol where each of the hydroxyl-group hydrogen atoms in glycerol has been replaced by the alkyl group of a relatively long hydrocarbon chain carboxylic acid.

F) B) and E)
G) A) and C)

Correct Answer

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Which of the following is a fatty acid?


A) Which of the following is a fatty acid? A) B) C) D) E)
B) Which of the following is a fatty acid? A) B) C) D) E)
C) Which of the following is a fatty acid? A) B) C) D) E)
D) Which of the following is a fatty acid? A) B) C) D) E)
E) Which of the following is a fatty acid? A) B) C) D) E)

F) B) and E)
G) All of the above

Correct Answer

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The breaking apart of a dissacharide into its monosaccharide components involves the addition of a water molecule and is called _______.


A) condensation
B) peptide linkage
C) secondary structure
D) hydrolysis
E) transport

F) All of the above
G) C) and E)

Correct Answer

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Which of the following is not a protein?


A) hormones, such as oxytocin
B) structural substances, such as keratin
C) antibodies, such as immunoglobulin
D) transport facilitators, such as hemoglobin
E) saturated triglycerides, such as triolein

F) A) and E)
G) B) and C)

Correct Answer

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Which of these elements is not found in proteins?


A) S
B) P
C) C
D) O
E) N

F) C) and D)
G) A) and B)

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B

An amino acid is a compound that contains at least


A) one amino group and one amide group.
B) two amino groups and one carboxylic acid group.
C) one hydroxyl group and one methyl group.
D) one carboxylic acid group and one amino group.
E) one methyl group and one amide group.

F) All of the above
G) A) and E)

Correct Answer

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Which of the structures below corresponds to the dipeptide alanylserine? Which of the structures below corresponds to the dipeptide alanylserine? A) B) C) D)


A) Which of the structures below corresponds to the dipeptide alanylserine? A) B) C) D)
B) Which of the structures below corresponds to the dipeptide alanylserine? A) B) C) D)
C) Which of the structures below corresponds to the dipeptide alanylserine? A) B) C) D)
D) Which of the structures below corresponds to the dipeptide alanylserine? A) B) C) D)

E) None of the above
F) B) and C)

Correct Answer

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The backbone of a strand of nucleic acid consists of


A) phosphate units only.
B) phosphate and sugar units.
C) polyester.
D) phosphate, sugar, and nitrogen base units.
E) sugar units only.

F) B) and E)
G) All of the above

Correct Answer

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