Question 1

The bonding of two amino acid molecules to form a larger molecule requires

Accepted Answer

A)   the release of a water molecule.
B)   the release of a carbon dioxide molecule.
C)   the addition of a nitrogen atom.
D)   the addition of a water molecule.
E)   the release of a nitrous oxide molecule.

Question 2

Which of the following is not a polymer?

Accepted Answer

A)   glucose
B)   starch
C)   cellulose
D)   chitin
E)   DNA A

Question 3

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.
  
Figure 5.8
-Which of the following molecules is a purine type of nitrogenous base?

Accepted Answer

A)   2
B)   3
C)   5
D)   12
E)   13

Question 4

Which of the following statements concerning unsaturated fats is true?

Accepted Answer

A)   They are more common in animals than in plants.
B)   They have double bonds in the carbon chains of their fatty acids.
C)   They generally solidify at room temperature.
D)   They contain more hydrogen than do saturated fats having the same number of carbon atoms.
E)   They have fewer fatty acid molecules per fat molecule.

Question 5

If ¹⁴C-labeled uridine triphosphate is added to the growth medium of cells, what macromolecules will be labeled?

Accepted Answer

A)   phospholipids
B)   DNA
C)   RNA
D)   both DNA and RNA
E)   proteins

Question 6

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.
  
Figure 5.8
-Which of the following molecules act as building blocks (monomers) of polypeptides?

Accepted Answer

A)   1, 4, and 6
B)   2, 7, and 8
C)   7, 8, and 13
D)   11, 12, and 13
E)   12, 13, and 15

Question 7

In a normal cellular protein, where would you expect to find a hydrophobic amino acid like valine?

Accepted Answer

A)   in the interior of the folded protein, away from water
B)   on the exterior surface of the protein, interacting with water
C)   in the transmembrane portion interacting with lipid fatty acid chains
D)   in the interior of the folded protein, away from water, or in a transmembrane portion interacting with lipid fatty acid chains
E)   anywhere in the protein, with equal probability

Question 8

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Accepted Answer

A)   The two strands of the double helix would separate.
B)   The phosphodiester linkages of the polynucleotide backbone would be broken.
C)   The purines would be separated from the deoxyribose sugars.
D)   The pyrimidines would be separated from the deoxyribose sugars.
E)   All bases would be separated from the deoxyribose sugars.

Question 9

Which of the following statements best summarizes the differences between DNA and RNA?

Accepted Answer

A)   DNA encodes hereditary information, whereas RNA does not.
B)   The bases in DNA form base-paired duplexes, whereas the bases in RNA do not.
C)   DNA nucleotides contain a different sugar than RNA nucleotides.
D)   DNA contains the base uracil, whereas RNA contains the base thymine.
E)   DNA encodes hereditary information, whereas RNA does not; the bases in DNA form base-paired duplexes, whereas the bases in RNA do not; and DNA nucleotides contain a different sugar than RNA nucleotides. C

Question 10

Use the following information to answer the questions below.
Approximately 32 different monomeric carbohydrate subunits are found in various natural polysaccharides. Proteins are composed of 20 different amino acids. DNA and RNA are each synthesized from four nucleotides.
-Among these biological polymers, which has the least structural variety?

Accepted Answer

A)   polysaccharides
B)   proteins
C)   DNA
D)   RNA

Question 11

Which of the following statements is true for the class of biological molecules known as lipids?

Accepted Answer

A)   They are insoluble in water.
B)   They are made from glycerol, fatty acids, and phosphate.
C)   They contain less energy than proteins and carbohydrates.
D)   They are made by dehydration reactions.
E)   They contain nitrogen.

Question 12

Which of the following statements concerning saturated fats is not true?

Accepted Answer

A)   They are more common in animals than in plants.
B)   They have multiple double bonds in the carbon chains of their fatty acids.
C)   They generally solidify at room temperature.
D)   They contain more hydrogen than unsaturated fats having the same number of carbon atoms.
E)   They are one of several factors that contribute to atherosclerosis. B

Question 13

A molecule with the formula C₁₈H₃₆O₂ is probably a

Accepted Answer

A)   carbohydrate.
B)   fatty acid.
C)   protein.
D)   nucleic acid.
E)   hydrocarbon.

Question 14

The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are the α form. Which of the following could amylase break down?

Accepted Answer

A)   glycogen
B)   cellulose
C)   chitin
D)   glycogen and chitin only
E)   glycogen, cellulose, and chitin

Question 15

Which bonds are created during the formation of the primary structure of a protein?

Accepted Answer

A)   peptide bonds
B)   hydrogen bonds
C)   disulfide bonds
D)   phosphodiester bonds
E)   peptide bonds, hydrogen bonds, and disulfide bonds

Question 16

Use the following information to answer the questions below.
Approximately 32 different monomeric carbohydrate subunits are found in various natural polysaccharides. Proteins are composed of 20 different amino acids. DNA and RNA are each synthesized from four nucleotides.
-Professor Jamey Marth at the University of California, Santa Barbara, identified 70 molecules that are used to build cellular macromolecules and structures. These include at least 34 saccharides, 8 nucleosides, and 20 amino acids. In theory, then, which class of biological polymer has the greatest information-coding capacity?

Accepted Answer

A)   polysaccharides
B)   proteins
C)   DNA
D)   RNA

Question 17

Which of the following are nitrogenous bases of the pyrimidine type?

Accepted Answer

A)   guanine and adenine
B)   cytosine and uracil
C)   thymine and guanine
D)   ribose and deoxyribose
E)   adenine and thymine

Question 18

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.
  
Figure 5.8
-Which molecule is a saturated fatty acid?

Accepted Answer

A)   1
B)   5
C)   6
D)   8
E)   9

Question 19

One of the primary functions of RNA molecules is to

Accepted Answer

A)   transmit genetic information to offspring.
B)   function in the synthesis of proteins.
C)   make a copy of itself, thus ensuring genetic continuity.
D)   act as a pattern or blueprint to form DNA.
E)   form the genes of higher organisms.

Question 20

Which of the following polymers contain nitrogen?

Accepted Answer

A)   starch
B)   glycogen
C)   cellulose
D)   chitin
E)   amylopectin

Exam 5: The Structure and Function of Large Biological Molecules

The bonding of two amino acid molecules to form a larger molecule requires

Correct Answer
verified

Which of the following is not a polymer?

Correct Answer
verified
A

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all. Figure 5.8 -Which of the following molecules is a purine type of nitrogenous base?

Correct Answer
verified

Which of the following statements concerning unsaturated fats is true?

Correct Answer
verified

If ¹⁴C-labeled uridine triphosphate is added to the growth medium of cells, what macromolecules will be labeled?

Correct Answer
verified

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all. Figure 5.8 -Which of the following molecules act as building blocks (monomers) of polypeptides?

Correct Answer
verified

In a normal cellular protein, where would you expect to find a hydrophobic amino acid like valine?

Correct Answer
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Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Correct Answer
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Which of the following statements best summarizes the differences between DNA and RNA?

Correct Answer
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C

Correct Answer
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Which of the following statements is true for the class of biological molecules known as lipids?

Correct Answer
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Which of the following statements concerning saturated fats is not true?

Correct Answer
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B

A molecule with the formula C₁₈H₃₆O₂ is probably a

Correct Answer
verified

The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are the α form. Which of the following could amylase break down?

Correct Answer
verified

Which bonds are created during the formation of the primary structure of a protein?

Correct Answer
verified

Correct Answer
verified

Which of the following are nitrogenous bases of the pyrimidine type?

Correct Answer
verified

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all. Figure 5.8 -Which molecule is a saturated fatty acid?

Correct Answer
verified

One of the primary functions of RNA molecules is to

Correct Answer
verified

Which of the following polymers contain nitrogen?

Correct Answer
verified

Exam 5: The Structure and Function of Large Biological Molecules

The bonding of two amino acid molecules to form a larger molecule requires

Correct AnswerverifiedShow Answer

Which of the following is not a polymer?

Correct AnswerverifiedA

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all. Figure 5.8 -Which of the following molecules is a purine type of nitrogenous base?

Correct AnswerverifiedShow Answer

Which of the following statements concerning unsaturated fats is true?

Correct AnswerverifiedShow Answer

If ¹⁴C-labeled uridine triphosphate is added to the growth medium of cells, what macromolecules will be labeled?

Correct AnswerverifiedShow Answer

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all. Figure 5.8 -Which of the following molecules act as building blocks (monomers) of polypeptides?

Correct AnswerverifiedShow Answer

In a normal cellular protein, where would you expect to find a hydrophobic amino acid like valine?

Correct AnswerverifiedShow Answer

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Correct AnswerverifiedShow Answer

Which of the following statements best summarizes the differences between DNA and RNA?

Correct AnswerverifiedC

Correct AnswerverifiedShow Answer

Which of the following statements is true for the class of biological molecules known as lipids?

Correct AnswerverifiedShow Answer

Which of the following statements concerning saturated fats is not true?

Correct AnswerverifiedB

A molecule with the formula C₁₈H₃₆O₂ is probably a

Correct AnswerverifiedShow Answer

The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are the α form. Which of the following could amylase break down?

Correct AnswerverifiedShow Answer

Which bonds are created during the formation of the primary structure of a protein?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following are nitrogenous bases of the pyrimidine type?

Correct AnswerverifiedShow Answer

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all. Figure 5.8 -Which molecule is a saturated fatty acid?

Correct AnswerverifiedShow Answer

One of the primary functions of RNA molecules is to

Correct AnswerverifiedShow Answer

Which of the following polymers contain nitrogen?

Correct AnswerverifiedShow Answer

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A

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C

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B

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