Question 1

Fatty acids with a carboncarbon double bond are called ________.

Accepted Answer

The answer of Fatty acids with a carboncarbon double bond...

Question 2

Which of the following provides long-term energy storage for plants?

Accepted Answer

A)  glucose
B)  glycogen
C)  starch
D)  cellulose
E)  ATP

Question 3

Adenosine triphosphate is an example of a(n) :

Accepted Answer

A)  carbohydrate.
B)  protein.
C)  lipid.
D)  nucleotide.
E)  inorganic molecule.

Question 4

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

Question 5

The specific function of a protein is determined by the:

Accepted Answer

A)  exact sequence of amino acids.
B)  number of disulfide bonds.
C)  hydrophilic "head" attached to the hydrophobic "tail."
D)  fatty acids that are joined together in the polypeptide.
E)  number of peptide bonds it contains.

Question 6

Why is it an advantage for animals that migrate long distances to store energy as lipids rather than carbohydrates?

Accepted Answer

Lipids (fats)store m...

Question 7

________ molecules are synthesized from carbon skeletons bonded to hydrogen atoms.

Accepted Answer

The answer of ________ molecules are synthesized from carbon skeletons...

Question 8

Which of the following include monosaccharide monomers?

Accepted Answer

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

Question 9

What are the four major types of biological molecules?

Accepted Answer

carbohydrates, lipid...

Question 10

All of the following are polypeptides EXCEPT:

Accepted Answer

A)  starch.
B)  maltose.
C)  glycogen.
D)  chitin.

Question 11

All of the following lipids or lipid components are hydrophobic EXCEPT:

Accepted Answer

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

Question 12

Which of the following can serve as an energy source and as structural support in plant cells?

Accepted Answer

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

Question 13

Enzymes are ________ that orchestrate chemical reactions within the body.

Accepted Answer

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

Question 14

Which of the following lipids make up about 2% of the human brain?

Accepted Answer

A)  glycogen
B)  myosin
C)  glycerol
D)  cholesterol

Question 15

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

Question 16

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the ________ structure, whereas the hydrogen bonds hold together molecules within the helical ________ structure.

Accepted Answer

A)  primary; secondary
B)  secondary; tertiary
C)  tertiary; quaternary
D)  primary; tertiary
E)  secondary; quaternary

Question 17

Imagine that you have isolated a mysterious liquid from a sample of food. You add the liquid to a beaker of water and shake vigorously. After a few minutes, the water and the other liquid separate into two layers. To which class of biological molecules does the unknown liquid most likely belong?

Accepted Answer

A)  carbohydrates
B)  lipids
C)  proteins
D)  enzymes
E)  nucleic acids

Question 18

A peptide bond forms between which of these groups?

Accepted Answer

A)  amino and aldehyde
B)  carboxyl and amino
C)  hydroxyl and carboxyl
D)  phosphate and hydroxyl
E)  carboxyl and aldehyde

Question 19

As shown in this figure, the top triglyceride (a) has ________, whereas the bottom triglyceride (b) has ________.

Accepted Answer

A)  double bonds and is saturated; no double bonds and is unsaturated
B)  no double bonds and is saturated; double bonds and is unsaturated
C)  no double bonds and is unsaturated; double bonds and is saturated
D)  double bonds and is unsaturated; no double bonds and is saturated

Question 20

The linear arrangement of amino acids in a polypeptide chain is referred to as the ________ structure of the protein.

Accepted Answer

The answer of The linear arrangement of amino acids in...

Exam 3: Biological Molecules

Enzymes are ________ that orchestrate chemical reactions within the body.

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The linear arrangement of amino acids in a polypeptide chain is referred to as the ________ structure of the protein.

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Adenosine triphosphate is an example of a(n) :

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Which of the following lipids make up about 2% of the human brain?

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________ molecules are synthesized from carbon skeletons bonded to hydrogen atoms.

Correct AnswerverifiedShow Answer

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the ________ structure, whereas the hydrogen bonds hold together molecules within the helical ________ structure.

Correct AnswerverifiedShow Answer

Fatty acids with a carboncarbon double bond are called ________.

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A peptide bond forms between which of these groups?

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What are the four major types of biological molecules?

Correct Answerverifiedcarbohydrates, lipid...View AnswerShow Answer

The specific function of a protein is determined by the:

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All of the following are polypeptides EXCEPT:

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Which of the following provides long-term energy storage for plants?

Correct AnswerverifiedShow Answer

Imagine that you have isolated a mysterious liquid from a sample of food. You add the liquid to a beaker of water and shake vigorously. After a few minutes, the water and the other liquid separate into two layers. To which class of biological molecules does the unknown liquid most likely belong?

Correct AnswerverifiedShow Answer

All of the following lipids or lipid components are hydrophobic EXCEPT:

Correct AnswerverifiedShow Answer

Which of the following include monosaccharide monomers?

Correct AnswerverifiedShow Answer

Which of the following can serve as an energy source and as structural support in plant cells?

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

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

Why is it an advantage for animals that migrate long distances to store energy as lipids rather than carbohydrates?

Correct AnswerverifiedLipids (fats)store m...View AnswerShow Answer

As shown in this figure, the top triglyceride (a) has ________, whereas the bottom triglyceride (b) has ________.

Correct AnswerverifiedShow Answer

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As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the structure, whereas the hydrogen bonds hold together molecules within the helical structure.

Correct Answer
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carbohydrates, lipid...
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Lipids (fats)store m...
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As shown in this figure, the top triglyceride (a) has , whereas the bottom triglyceride (b) has .

Correct Answer
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