Bioportal Ch. 3 Essay Example
1. | Which of the following biological molecules is/are linked by covalent bonds formed by the removal of the elements of water from the reactants (a kind of condensation reaction)? | | A. | Oils | B. | Waxes | C. | Proteins | D. | Starch | E. | All of the above | |
Incorrect
See Section 3.2: What Are the Chemical Structures and Functions of Proteins? | Points Earned: | 0/1 | Correct Answer: | E | Your Response: | D | 2. | There are a number of functional groups in biological molecules. Which of the following statements about their presence in different classes of molecules is most accurate? | | A. | Hydroxyl groups are only present in carbohydrates. | B. | Aldehyde groups are common in proteins. | C. | Amino groups may be found in modified carbohydrates as well as in proteins. | D. | Carboxyl groups are found only in small molecules. | E. | Sulfhydryl groups are common in fats. | |
Incorrect
See Section 3.1: What Kinds of Molecules Characterize Living Things? | Points Earned: | 0/1 | Correct Answer: | C | Your Response: | A | 3. | Where would the leucine side chain most likely be found in a protein dissolved in water? | | A. | In the interior of the protein in contact with nonpolar side chains | B. | In the interior of the protein in contact with polar side chains | C. | On the exterior of the protein | D. | In the interior of the protein in contact with water | E. | Either on the interior or exterior of the protein | |
Correct
See Section 3.2: What Are the Chemical Structures and Functions of Proteins? | Points Earned: | 1/1 | Correct Answer: | A | Your Response: | A | 4. | Molecular chaperones | | A. | are small molecules | B. | are made in decreased amounts after exposure of an organism to high temperatures. | C. | are absent in insects. | D. | can prevent harmful interactions by improperly folded proteins. | E. | bind proteins irreversibly. | |
Incorrect
See Section 3.2:
Incorrect
See Section 3.2: What Are the Chemical Structures and Functions of Proteins? | Points Earned: | 0/1 | Correct Answer: | E | Your Response: | D | 2. | There are a number of functional groups in biological molecules. Which of the following statements about their presence in different classes of molecules is most accurate? | | A. | Hydroxyl groups are only present in carbohydrates. | B. | Aldehyde groups are common in proteins. | C. | Amino groups may be found in modified carbohydrates as well as in proteins. | D. | Carboxyl groups are found only in small molecules. | E. | Sulfhydryl groups are common in fats. | |
Incorrect
See Section 3.1: What Kinds of Molecules Characterize Living Things? | Points Earned: | 0/1 | Correct Answer: | C | Your Response: | A | 3. | Where would the leucine side chain most likely be found in a protein dissolved in water? | | A. | In the interior of the protein in contact with nonpolar side chains | B. | In the interior of the protein in contact with polar side chains | C. | On the exterior of the protein | D. | In the interior of the protein in contact with water | E. | Either on the interior or exterior of the protein | |
Correct
See Section 3.2: What Are the Chemical Structures and Functions of Proteins? | Points Earned: | 1/1 | Correct Answer: | A | Your Response: | A | 4. | Molecular chaperones | | A. | are small molecules | B. | are made in decreased amounts after exposure of an organism to high temperatures. | C. | are absent in insects. | D. | can prevent harmful interactions by improperly folded proteins. | E. | bind proteins irreversibly. | |
Incorrect
See Section 3.2: