Question 1

Two categories of organic compounds typically provide energy for living systems. Representatives of these two classes are

Accepted Answer

A)   carbohydrates and proteins.
B)   proteins and nucleic acids.
C)   carbohydrates and nucleic acids.
D)   lipids and proteins.
E)   carbohydrates and lipids.

Question 2

Which nucleotide molecule functions as an energy carrier in the cell?

Accepted Answer

The answer of Which nucleotide molecule functions as an energy...

Question 3

Keratin and silk are examples of_________ , whereas glucose and maltose are examples of _________.

Accepted Answer

A)   carbohydrates; proteins
B)   proteins; lipids
C)   nucleic acids; lipids
D)   proteins; carbohydrates

Question 4

Which type of molecule is most abundant in a typical cell?

Accepted Answer

A)   Water
B)   Carbohydrate
C)   Lipid
D)   Protein
E)   Nucleic acids

Question 5

Which of the following best explains the molecular complexity of living organisms?

Accepted Answer

A)   Each organism has its own unique set of monomers for use in constructing polymers.
B)   The large number of different monomers allows for the construction of many polymers.
C)   Condensation reactions can create different polymers because they can combine virtually any molecules in the cell.
D)   A small number of monomers can be assembled into large polymers with many different combinations/sequences.
E)   Although there are not many biological molecules in cells, each one has many different functions.

Question 6

Functional groups determine the characteristics and chemical reactivity of organic molecules.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements about lipids is incorrect?

Accepted Answer

A)   They are short chains of polar hydrocarbons.
B)   They are used for energy storage.
C)   They are hydrophobic and water insoluble.
D)   They are large chains of nonpolar hydrocarbons.
E)   They are primary component of cell membranes.

Question 8

Hydrolysis may be correctly described as the

Accepted Answer

A)   removal of water from a polymer.
B)   breaking of a compound into its subunits by using water to break the bond between monomers.
C)   heating of a compound in order to drive off its excess water and to concentrate its volume.
D)   constant removal of hydrogen atoms from a carbohydrate.

Question 9

DNA carries genetic information in its

Accepted Answer

A)   sugar groups.
B)   sequence of bases.
C)   helical form.
D)   phosphate groups.
E)   tertiary structure.

Question 10

The carbohydrate in DNA is

Accepted Answer

A)   ribose.
B)   phosphate.
C)   deoxyribose.
D)   cellulose.
E)   glucose.

Question 11

Explain how a saturated fat is structurally different from an unsaturated fat.

Accepted Answer

A saturated fat has three fatty acids th...

Question 12

Your classmate is trying to keep all the facts about biological molecules straight. He asks you to explain how amino acids and proteins are related. What do you tell him?

Accepted Answer

A)   Proteins are a portion of an amino acid.
B)   Proteins are chains of carbohydrates, and amino acids are a type of lipid.
C)   Proteins are made up of chains of amino acids.
D)   Amino acids are formed by joining together many proteins.

Question 13

What are some of the similarities and differences between DNA and RNA?

Accepted Answer

DNA uses the nucleotides A-T-G...

Question 14

Which of the following biological molecules are composed of monomer units containing a sugar, a phosphate group, and a nitrogen-containing base?

Accepted Answer

A)   Carbohydrates
B)   Lipids
C)   Proteins
D)   Nucleic acids

Question 15

What maintains the secondary structure of a protein?

Accepted Answer

A)   Hydrogen bonds
B)   Peptide bonds
C)   Disulfide bonds
D)   Ionic bonds

Question 16

All of the following lipids or lipid components are hydrophobic EXCEPT

Accepted Answer

A)   saturated fats.
B)   waxes.
C)   fatty acid tails.
D)   unsaturated fats.
E)   fatty acid heads.

Question 17

Describe the differences between saturated and unsaturated fatty acids. Which is most likely to be solid at room temperature? Why?

Accepted Answer

Saturated fats have only single C-C bond...

Question 18

Suppose you have discovered a new virus and have isolated its nucleic acids. What feature could you look for to determine whether the nucleic acids of this virus are RNA or DNA?

Accepted Answer

A)   If it is DNA, the virus will not contain proteins.
B)   If it is RNA, there will be no adenine.
C)   If is RNA, it will contain deoxyribose.
D)   If it is RNA, it will contain ribose.

Question 19

New government regulations require that foods containing trans fats be labeled appropriately. A trans fat is formed when food manufacturers turn liquid oils into solid fats by adding hydrogen to vegetable oils. This hydrogenation process produces a solid fat because adding the hydrogen

Accepted Answer

A)   forms a wax molecule.
B)   allows fats to form tertiary and quaternary structures.
C)   allows the fatty acid chains to pack together more tightly.
D)   causes a phospholipid to form.

Question 20

Which of the following is insoluble in water?

Accepted Answer

A)   DNA
B)   Salt
C)   Amino acids
D)   Olive oil
E)   Sucrose

Exam 3: Biological Molecules

Functional groups determine the characteristics and chemical reactivity of organic molecules.

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Which of the following statements about lipids is incorrect?

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The carbohydrate in DNA is

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Describe the differences between saturated and unsaturated fatty acids. Which is most likely to be solid at room temperature? Why?

Correct AnswerverifiedSaturated fats have only single C-C bond...View AnswerShow Answer

Which type of molecule is most abundant in a typical cell?

Correct AnswerverifiedShow Answer

DNA carries genetic information in its

Correct AnswerverifiedShow Answer

Your classmate is trying to keep all the facts about biological molecules straight. He asks you to explain how amino acids and proteins are related. What do you tell him?

Correct AnswerverifiedShow Answer

New government regulations require that foods containing trans fats be labeled appropriately. A trans fat is formed when food manufacturers turn liquid oils into solid fats by adding hydrogen to vegetable oils. This hydrogenation process produces a solid fat because adding the hydrogen

Correct AnswerverifiedShow Answer

Which of the following is insoluble in water?

Correct AnswerverifiedShow Answer

What maintains the secondary structure of a protein?

Correct AnswerverifiedShow Answer

Two categories of organic compounds typically provide energy for living systems. Representatives of these two classes are

Correct AnswerverifiedShow Answer

Hydrolysis may be correctly described as the

Correct AnswerverifiedShow Answer

Explain how a saturated fat is structurally different from an unsaturated fat.

Correct AnswerverifiedA saturated fat has three fatty acids th...View AnswerShow Answer

Which of the following best explains the molecular complexity of living organisms?

Correct AnswerverifiedShow Answer

What are some of the similarities and differences between DNA and RNA?

Correct AnswerverifiedDNA uses the nucleotides A-T-G...View AnswerShow Answer

Suppose you have discovered a new virus and have isolated its nucleic acids. What feature could you look for to determine whether the nucleic acids of this virus are RNA or DNA?

Correct AnswerverifiedShow Answer

Which nucleotide molecule functions as an energy carrier in the cell?

Correct AnswerverifiedShow Answer

Which of the following biological molecules are composed of monomer units containing a sugar, a phosphate group, and a nitrogen-containing base?

Correct AnswerverifiedShow Answer

Keratin and silk are examples of_________ , whereas glucose and maltose are examples of _________.

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All of the following lipids or lipid components are hydrophobic EXCEPT

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Saturated fats have only single C-C bond...
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A saturated fat has three fatty acids th...
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DNA uses the nucleotides A-T-G...
View Answer

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Keratin and silk are examples of_ , whereas glucose and maltose are examples of _.

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