Question 1

Which functional group is present in this molecule?

Accepted Answer

A)   sulfhydryl
B)   carboxyl
C)   methyl
D)   phosphateE) None of the above
F) A) and D)

Question 2

Use the following figure to answer the question.  The two molecules shown in the figures are best described as ________.

Accepted Answer

A)   enantiomers
B)   structural isomers
C)   cis-trans isomers
D)   chain length isomersE) C) and D)
F) All of the above

Question 3

Compared to a hydrocarbon chain where all the carbon atoms are linked by single bonds, which of the following statements best describe a hydrocarbon chain with the same number of carbon atoms but with one or more double bonds?

Accepted Answer

A)   It will be more flexible in structure.
B)   It will be more constrained in structure.
C)   It will be more polar.
D)   It will contain more hydrogen atoms.E) A) and B)
F) All of the above

Question 4

Use the figures to answer the following question.  Which molecule(s)  shown is (are)  ionized in a cell?

Accepted Answer

A)   A
B)   B and D
C)   C and D
D)   DE) A) and B)
F) None of the above

Question 5

Which of the following identifies the chemical relationship between glucose and fructose?

Accepted Answer

A)   They are isotopes.
B)   They are enantiomers.
C)   They are cis-trans isomers.
D)   They are structural isomers.E) B) and C)
F) None of the above

Question 6

ATP is necessary for life because ________.

Accepted Answer

A)   it tastes good
B)   it is soluble in water
C)   it speeds up the biological processes
D)   it is the principle energy carrying molecule in a cellE) C) and D)
F) A) and B)

Question 7

Use the figures to answer the question.  Which functional group shown in the figure can accept protons and raise the pH of the surrounding solution?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) A) and B)
F) A) and C)

Question 8

Which of the following illustrations is not a structural isomer of an organic compound with the molecular formula C6H14? For clarity, only the carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted.

Accepted Answer

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

Question 9

Choose the term that correctly describes the relationship between these two sugar molecules.

Accepted Answer

A)   structural isomers
B)   cis-trans isomers
C)   enantiomers
D)   isotopesE) A) and C)
F) C) and D)

Question 10

Which of the following factors determines whether a carbon atom's covalent bonds with other atoms are in a tetrahedral configuration or a planar configuration?

Accepted Answer

A)   temperature of the solvent
B)   double bonds between the carbon atom and other atoms
C)   polarity of the covalent bonds
D)   solvent in which the organic molecule is dissolvedE) B) and C)
F) A) and D)

Question 11

Which of the following unique feature of carbon allows it to support life on Earth?

Accepted Answer

A)   Carbon is hydrophobic in nature.
B)   Carbon is the most abundant element on earth.
C)   Carbon can form a variety of bonds in nature.
D)   Carbon is the most electronegative element in the periodic table.E) None of the above
F) B) and D)

Question 12

Which of the following statements about ADP/ATP is true?

Accepted Answer

A)   ADP contains more energy than ATP.
B)   Following hydrolysis, ATP can release one phosphate, whereas ADP cannot.
C)   ADP can have two positive charges.
D)   ATP can have four negative charges.E) B) and C)
F) A) and D)

Question 13

Use the figures to answer the following question.  Which molecule shown has a carbonyl functional group in the form of a ketone?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) B) and C)
F) A) and D)

Question 14

Which of the following functional groups gives amino acids their acidic character?

Accepted Answer

A)   amino
B)   carbonyl
C)   carboxyl
D)   phosphateE) B) and C)
F) A) and D)

Question 15

Which two functional groups are always found in amino acids?

Accepted Answer

A)   carbonyl and amino groups
B)   carboxyl and amino groups
C)   amino and sulfhydryl groups
D)   hydroxyl and carboxyl groupsE) B) and C)
F) A) and D)

Question 16

A carbon atom is most likely to form what kind of bond(s)  with other atoms?

Accepted Answer

A)   ionic
B)   hydrogen
C)   covalent
D)   carbon is an inert elementE) None of the above
F) A) and D)

Question 17

Miller's classic experiment demonstrated that a discharge of sparks through a mixture of gases could result in the formation of a large variety of organic compounds. Miller did not use which one of the following gases in his experiment?

Accepted Answer

A)   methane
B)   oxygen
C)   water
D)   ammoniaE) A) and B)
F) A) and C)

Question 18

Use the figures to answer the following question.  Which molecule shown has at least one carbon atom attached to three different chemical groups?

Accepted Answer

A)   A
B)   B
C)   D
D)   A and BE) B) and C)
F) B) and D)

Question 19

Visualize the structural formula of each of the following hydrocarbons. Which hydrocarbon has a double bond in its carbon skeleton?

Accepted Answer

A)   C3H8
B)   C2H6
C)   C2H4
D)   C2H2E) A) and D)
F) None of the above

Question 20

Which of the following explains why the valency of carbon is 4 even though it has 6 electrons?

Accepted Answer

A)   donates its 2 electrons to another atom
B)   shares its 2 electrons and bonds with another atom
C)   has 4 electrons in its first shell and 2 in the second shell
D)   has 2 electrons in its first shell and 4 in the second shellE) C) and D)
F) None of the above

Exam 4: Carbon: the Basis of Molecular Diversity

Which of the following factors determines whether a carbon atom's covalent bonds with other atoms are in a tetrahedral configuration or a planar configuration?

Correct AnswerverifiedShow Answer

Which of the following unique feature of carbon allows it to support life on Earth?

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Compared to a hydrocarbon chain where all the carbon atoms are linked by single bonds, which of the following statements best describe a hydrocarbon chain with the same number of carbon atoms but with one or more double bonds?

Correct AnswerverifiedShow Answer

ATP is necessary for life because ________.

Correct AnswerverifiedShow Answer

Which of the following illustrations is not a structural isomer of an organic compound with the molecular formula C6H14? For clarity, only the carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted.

Correct AnswerverifiedShow Answer

Which functional group is present in this molecule?

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Visualize the structural formula of each of the following hydrocarbons. Which hydrocarbon has a double bond in its carbon skeleton?

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Which two functional groups are always found in amino acids?

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Miller's classic experiment demonstrated that a discharge of sparks through a mixture of gases could result in the formation of a large variety of organic compounds. Miller did not use which one of the following gases in his experiment?

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Use the following figure to answer the question. The two molecules shown in the figures are best described as ________.

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Choose the term that correctly describes the relationship between these two sugar molecules.

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Use the figures to answer the following question. Which molecule shown has a carbonyl functional group in the form of a ketone?

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A carbon atom is most likely to form what kind of bond(s) with other atoms?

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Which of the following identifies the chemical relationship between glucose and fructose?

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Which of the following functional groups gives amino acids their acidic character?

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Use the figures to answer the following question. Which molecule(s) shown is (are) ionized in a cell?

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Use the figures to answer the question. Which functional group shown in the figure can accept protons and raise the pH of the surrounding solution?

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Which of the following explains why the valency of carbon is 4 even though it has 6 electrons?

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Use the figures to answer the following question. Which molecule shown has at least one carbon atom attached to three different chemical groups?

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Which of the following statements about ADP/ATP is true?

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