Question 1

Glucose and fructose both have the formula C6H12O6, but the atoms in these two compounds are arranged differently. Glucose and fructose are therefore

Accepted Answer

A)   isomers.
B)   polysaccharides.
C)   oligosaccharides.
D)   pentoses.
E)   steroids.F) A) and D)
G) A) and B)

Question 2

The compound inositol has six hydroxyl groups attached to a six-carbon backbone. Thus inositol can be classified as a(n ) _______.

Accepted Answer

The answer of The compound inositol has six hydroxyl groups...

Question 3

The functional group written as -COOH is called the _______ group.

Accepted Answer

The answer of The functional group written as -COOH is...

Question 4

Aspartate and glutamate are highly soluble in water; therefore, they

Accepted Answer

A)   are hydrophobic.
B)   have sulfur atoms in their side chains.
C)   have electrically charged side chains.
D)   are nonpolar.
E)   form only left-hand isomers.F) A) and D)
G) A) and C)

Question 5

The portion of a phospholipid that contains the phosphorous group has one or more electric charges. That makes this region of the molecule

Accepted Answer

A)   hydrophobic.
B)   hydrophilic.
C)   nonpolar.
D)   unsaturated.
E)   saturated.F) A) and B)
G) A) and C)

Question 6

Which of the following statements about proteins is true?

Accepted Answer

A)   They are insoluble in water.
B)   They are the structural units of glycogen.
C)   They possess glycosidic linkages between amino acids.
D)   Some function as enzymes.
E)   They are involved in information storage.F) All of the above
G) B) and D)

Question 7

Molecules that are both attracted to water and repel water are called

Accepted Answer

A)   hydrophilic.
B)   hydrophobic.
C)   amphipathic.
D)   amphoric.
E)   glycosidic.F) A) and C)
G) A) and E)

Question 8

All living cells contain the monosaccharide _______.

Accepted Answer

The answer of All living cells contain the monosaccharide _______....

Question 9

The atoms that make up carbohydrates are

Accepted Answer

A)   C, H, and N.
B)   C and H.
C)   C, H, and P.
D)   C, H, and O.
E)   C, H, O, and N.F) A) and D)
G) A) and C)

Question 10

Which of the following is not a function in which lipids play an important role?

Accepted Answer

A)   Vision
B)   Storing energy
C)   Membrane structure
D)   Storing genetic information
E)   Chemical signalingF) A) and E)
G) C) and E)

Question 11

Which of the following statements about the primary structure of a protein is not true?

Accepted Answer

A)   It may be branched.
B)   It is held together by covalent bonds.
C)   It is unique to that protein.
D)   It determines the tertiary structure of the protein.
E)   It is the sequence of amino acids in the protein.F) A) and E)
G) None of the above

Question 12

What is the theoretical number of different proteins that you could make from 50 amino acids?

Accepted Answer

A)   5020
B)   20  ×	imes×  50
C)   2050
D)   1050
E)   250 F) A) and B)
G) None of the above

Question 13

All proteins

Accepted Answer

A)   are enzymes.
B)   consist of one or more polypeptide chains.
C)   are amino acids.
D)   have quaternary structures.
E)   are more soluble in nonpolar solvents than in water.F) D) and E)
G) None of the above

Question 14

The amphipathic nature of phospholipids is

Accepted Answer

A)   determined by the fatty acid composition.
B)   important in membrane structure.
C)   polar but not nonpolar.
D)   shown only if the lipid is in a nonpolar solvent.
E)   important in energy storage by lipids.F) A) and E)
G) B) and E)

Question 15

Discuss how a protein's three-dimensional structure makes it perfect for acting as a carrier and receptor molecule. In what ways are proteins uniquely suited for this function compared to other macromolecules?

Accepted Answer

The three-dimensional nature o...

Question 16

A simple sugar with the formula C5H10O5 can be classified as a

Accepted Answer

A)   hexose.
B)   polysaccharide.
C)   disaccharide.
D)   pentose.
E)   lipid.F) A) and E)
G) A) and C)

Question 17

A type of molecule very often drawn with a single six-sided ring structure is

Accepted Answer

A)   sucrose.
B)   an amino acid.
C)   glucose.
D)   a fatty acid.
E)   a steroid.F) B) and C)
G) None of the above

Question 18

The shape of a folded protein is often determined by

Accepted Answer

A)   its tertiary structure.
B)   the sequence of its amino acids.
C)   whether the peptide bonds have  α\alphaα  or  β\betaβ  linkages.
D)   the number of peptide bonds.
E)   the base-pairing rules. F) B) and C)
G) C) and D)

Question 19

The amino acids of the protein keratin are arranged in a helix. This secondary structure is stabilized by

Accepted Answer

A)   covalent bonds.
B)   peptide bonds.
C)   glycosidic linkages.
D)   polar bonds.
E)   hydrogen bonds.F) All of the above
G) B) and E)

Question 20

A macromolecule with many hydrogen and peptide bonds is most likely a

Accepted Answer

A)   carbohydrate.
B)   lipid.
C)   protein.
D)   nucleic acid.
E)   vitamin.F) C) and D)
G) B) and C)

Exam 3: Proteins, Carbohydrates, and Lipids

What is the theoretical number of different proteins that you could make from 50 amino acids?

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The shape of a folded protein is often determined by

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The amphipathic nature of phospholipids is

Correct AnswerverifiedShow Answer

Discuss how a protein's three-dimensional structure makes it perfect for acting as a carrier and receptor molecule. In what ways are proteins uniquely suited for this function compared to other macromolecules?

Correct AnswerverifiedThe three-dimensional nature o...View AnswerShow Answer

All proteins

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Glucose and fructose both have the formula C6H12O6, but the atoms in these two compounds are arranged differently. Glucose and fructose are therefore

Correct AnswerverifiedShow Answer

A simple sugar with the formula C5H10O5 can be classified as a

Correct AnswerverifiedShow Answer

Which of the following statements about the primary structure of a protein is not true?

Correct AnswerverifiedShow Answer

The amino acids of the protein keratin are arranged in a helix. This secondary structure is stabilized by

Correct AnswerverifiedShow Answer

A macromolecule with many hydrogen and peptide bonds is most likely a

Correct AnswerverifiedShow Answer

The atoms that make up carbohydrates are

Correct AnswerverifiedShow Answer

A type of molecule very often drawn with a single six-sided ring structure is

Correct AnswerverifiedShow Answer

The portion of a phospholipid that contains the phosphorous group has one or more electric charges. That makes this region of the molecule

Correct AnswerverifiedShow Answer

Aspartate and glutamate are highly soluble in water; therefore, they

Correct AnswerverifiedShow Answer

All living cells contain the monosaccharide _______.

Correct AnswerverifiedShow Answer

The compound inositol has six hydroxyl groups attached to a six-carbon backbone. Thus inositol can be classified as a(n ) _______.

Correct AnswerverifiedShow Answer

The functional group written as -COOH is called the _______ group.

Correct AnswerverifiedShow Answer

Which of the following is not a function in which lipids play an important role?

Correct AnswerverifiedShow Answer

Which of the following statements about proteins is true?

Correct AnswerverifiedShow Answer

Molecules that are both attracted to water and repel water are called

Correct AnswerverifiedShow Answer

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The three-dimensional nature o...
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Glucose and fructose both have the formula C₆H₁₂O₆, but the atoms in these two compounds are arranged differently. Glucose and fructose are therefore

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A simple sugar with the formula C₅H₁₀O₅ can be classified as a

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