Question 1

Nucleic acids are polymers made up of which of the following monomers?

Accepted Answer

A)  nucleotides
B)  sugars
C)  amino acids
D)  nitrogenous bases
E)  deoxyriboseF) None of the above
G) A) and E)

Question 2

The structural level of a protein least affected by a disruption in hydrogen bonding is the

Accepted Answer

A)  primary level.
B)  secondary level.
C)  tertiary level.
D)  quaternary level.
E)  All structural levels are equally affected.F) A) and E)
G) None of the above

Question 3

Which of these molecules is not formed by dehydration reactions?

Accepted Answer

A)  fatty acids
B)  disaccharides
C)  DNA
D)  protein
E)  amyloseF) B) and C)
G) B) and E) A

Question 4

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

Accepted Answer

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

Question 5

Use the following information to answer the questions below.
You have just had a breakfast of toast (high-fibre bread) with butter and jam (no added sugar) along with a glass of milk.
-Of these two,which one will not be hydrolyzed in your digestive tract?

Accepted Answer

A)  fatty acids
B)  cellulose
C)  starch
D)  glucose
E)  fructoseF) A) and D)
G) D) and E)

Question 6

How do phospholipids interact with water molecules?

Accepted Answer

A)  The polar heads avoid water, and the nonpolar tails attract water.
B)  Phospholipids do not interact with water because water is polar and lipids are nonpolar.
C)  The polar heads interact with water, and the nonpolar tails do not.
D)  The hydrocarbon tails form hydrogen bonds with water.
E)  Both the polar head and lipid backbone from hydrogen bonds with water.F) C) and D)
G) B) and D)

Question 7

Use the following figure to answer the questions below.
 
-If two molecules of the general type shown in the above figure were linked together,carbon-1 of one molecule to carbon-4 of the other,the single molecule that would result would be

Accepted Answer

A)  maltose.
B)  fructose.
C)  glucose.
D)  galactose.
E)  sucrose.F) C) and D)
G) B) and D)

Question 8

Use the following information to answer the questions below.
You have just had a breakfast of toast (high-fibre bread) with butter and jam (no added sugar) along with a glass of milk.
-What are the two major polysaccharides you have consumed?

Accepted Answer

A)  fatty acids and pectin
B)  cellulose and fructose
C)  starch and fructose
D)  glucose and fructose
E)  cellulose and starchF) A) and E)
G) A) and B) E

Question 9

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all.
 
-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 15F) A) and B)
G) B) and C)

Question 10

How will brief heating (to 95°C) affect macromolecular structures in aqueous solution?

Accepted Answer

A)  DNA duplexes will unwind and separate.
B)  Proteins will unfold (denature) .
C)  Starch will hydrolyze into monomeric sugars.
D)  Proteins will hydrolyze into amino acids.
E)  DNA duplexes will unwind and separate, and proteins will unfold (denature) .F) A) and B)
G) A) and C)

Question 11

Refer to the following figure to answer the questions below.
 
-Which bond is a peptide bond?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) C) and D)
G) A) and E)

Question 12

All of the following are polysaccharides except

Accepted Answer

A)  lactose.
B)  glycogen.
C)  chitin.
D)  cellulose.
E)  amylopectin.F) A) and D)
G) A) and C)

Question 13

The R group or side chain of the amino acid serine is -CH₂-OH.The R group or side chain of the amino acid leucine is -CH₂-CH-(CH₃₎₂.Where would you expect to find these amino acids in a globular protein in aqueous solution?

Accepted Answer

A)  Serine would be in the interior, and leucine would be on the exterior of the globular protein.
B)  Leucine would be in the interior, and serine would be on the exterior of the globular protein.
C)  Both serine and leucine would be in the interior of the globular protein.
D)  Both serine and leucine would be on the exterior of the globular protein.
E)  Both serine and leucine would be in the interior and on the exterior of the globular protein.F) None of the above
G) A) and E)

Question 14

If cells are grown in a medium containing radioactive ³²P-labelled phosphate,which of these molecules will be labelled?

Accepted Answer

A)  phospholipids
B)  nucleic acids
C)  proteins
D)  amylose
E)  both phospholipids and nucleic acidsF) A) and B)
G) A) and C) E

Question 15

Dehydration reactions are used in forming which of the following compounds?

Accepted Answer

A)  triacylglycerides
B)  polysaccharides
C)  proteins
D)  triacylglycerides and proteins only
E)  triacylglycerides, polysaccharides, and proteinsF) A) and C)
G) D) and E)

Question 16

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.F) C) and E)
G) C) and D)

Question 17

Which of the following techniques uses the amino acid sequences of polypeptides to predict a protein's three-dimensional structure?

Accepted Answer

A)  X-ray crystallography
B)  bioinformatics
C)  analysis of amino acid sequence of small fragments
D)  NMR spectroscopy
E)  high-speed centrifugationF) A) and B)
G) All of the above

Question 18

The molecular formula for glucose is C₆H₁₂O₆.What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?

Accepted Answer

A)  C₁₈H₃₆O₁₈
B)  C₁₈H₃₂O₁₆
C)  C₆H₁₀O₅
D)  C₁₈H₁₀O₁₅
E)  C₃H₆O₃F) A) and D)
G) A) and E)

Question 19

Which modifications of fatty acids will best keep triglycerides solid at warmer temperatures?

Accepted Answer

A)  creating cis double bonds to the fatty acids
B)  adding hydrogens to the fatty acids
C)  creating trans double bonds to the fatty acids
D)  adding hydrogens or trans double bonds to the fatty acids
E)  adding cis double bonds and trans double bonds to the fatty acidsF) A) and B)
G) A) and C)

Question 20

What happens when nucleotides polymerize to form a nucleic acid?

Accepted Answer

A)  A covalent bond forms between the sugar of one nucleotide and the phosphate of a second nucleotide.
B)  A hydrogen bond forms between the sugar of one nucleotide and the phosphate of a second nucleotide.
C)  Covalent bonds form between the bases of two nucleotides.
D)  Hydrogen bonds form between the bases of two nucleotides.
E)  A covalent bond forms between the sugar of one nucleotide and the base of a second nucleotide.F) A) and B)
G) C) and E)

Exam 5: The Structure and Function of Large Biological Molecules

Nucleic acids are polymers made up of which of the following monomers?

Correct AnswerverifiedShow Answer

The structural level of a protein least affected by a disruption in hydrogen bonding is the

Correct AnswerverifiedShow Answer

Which of these molecules is not formed by dehydration reactions?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

Use the following information to answer the questions below. You have just had a breakfast of toast (high-fibre bread) with butter and jam (no added sugar) along with a glass of milk. -Of these two,which one will not be hydrolyzed in your digestive tract?

Correct AnswerverifiedShow Answer

How do phospholipids interact with water molecules?

Correct AnswerverifiedShow Answer

Use the following figure to answer the questions below. -If two molecules of the general type shown in the above figure were linked together,carbon-1 of one molecule to carbon-4 of the other,the single molecule that would result would be

Correct AnswerverifiedShow Answer

Use the following information to answer the questions below. You have just had a breakfast of toast (high-fibre bread) with butter and jam (no added sugar) along with a glass of milk. -What are the two major polysaccharides you have consumed?

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

How will brief heating (to 95°C) affect macromolecular structures in aqueous solution?

Correct AnswerverifiedShow Answer

Refer to the following figure to answer the questions below. -Which bond is a peptide bond?

Correct AnswerverifiedShow Answer

All of the following are polysaccharides except

Correct AnswerverifiedShow Answer

The R group or side chain of the amino acid serine is -CH₂-OH.The R group or side chain of the amino acid leucine is -CH₂-CH-(CH₃₎₂.Where would you expect to find these amino acids in a globular protein in aqueous solution?

Correct AnswerverifiedShow Answer

If cells are grown in a medium containing radioactive ³²P-labelled phosphate,which of these molecules will be labelled?

Correct AnswerverifiedE

Dehydration reactions are used in forming which of the following compounds?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following techniques uses the amino acid sequences of polypeptides to predict a protein's three-dimensional structure?

Correct AnswerverifiedShow Answer

The molecular formula for glucose is C₆H₁₂O₆.What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?

Correct AnswerverifiedShow Answer

Which modifications of fatty acids will best keep triglycerides solid at warmer temperatures?

Correct AnswerverifiedShow Answer

What happens when nucleotides polymerize to form a nucleic acid?

Correct AnswerverifiedShow Answer

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