WGU C785 MODULE 2 QUIZ
Which image below shows the carboxyl group of an amino acid circled? - ✔An amino
acid consists of an amino group, carboxyl group, a hydrogen and a variable side chain
arranged around a central alpha carbon atom. The backbone of an amino acid is the
entire amino acid molecule minus the variable side chain. The carboxyl group of an
amino acid is shown as COO_ or COOH attached to a central alpha carbon atom of the
amino acid.
Which of the following statements is NOT true about the different levels of a protein
structure? - ✔The interactions between the side chains of the amino acids make up the
secondary level structure of a protein
Which statement reflects the role that protein structure can play in the disease process?
- ✔Mutation of an active site amino acid changes an enzyme's ability to bind a
substrate.
Aggregation of the proteins is the main reason behind many neurodegenerative
diseases. Which one of the following mutations will likely cause a neurodegenerative
disease? - ✔Replacing a polar amino acid with a non polar amino acid
Which pair (protein interaction and technique) will likely denature a protein? - ✔
Hydrogen bonds/ionic bonds: Change in pH
Which one of the following statements is NOT true about protein structure and stability?
- ✔Protein structure is not stabilized by the hydrophobic effect
Alkaline phosphatase is produced by bone and liver in the human body. The amount of
alkaline phosphatase in blood can help identify if a patient potentially has certain types
of bone and/or liver-related disease, including Paget disease, hepatitis, and certain
types of cancer. The optimal pH range for alkaline phosphatase activity is a pH of 8.0 to
10.0. What happens to the activity of the alkaline phosphatase at a pH of 2? - ✔
Significantly decreases
Inhibitors that have a similar structure to a substrate of an enzyme are most likely to
bind to the enzyme's ____________ and be a ____________ inhibitor. - ✔active site,
competitive
When an inhibitor binds reversibly to a site of the enzyme that is not the active site,
what type of inhibition results? - ✔Noncompetitive inhibition
Chymotrypsin is a digestive enzyme that has optimal activity at a pH of 7.8 and a
temperature of 37oC. Which of the following statements is true? - ✔The reaction rate
for chymotrypsin at a pH of 9.5 is lower than the reaction rate for chymotrypsin at a pH
of 7.8.
Which image below shows the carboxyl group of an amino acid circled? - ✔An amino
acid consists of an amino group, carboxyl group, a hydrogen and a variable side chain
arranged around a central alpha carbon atom. The backbone of an amino acid is the
entire amino acid molecule minus the variable side chain. The carboxyl group of an
amino acid is shown as COO_ or COOH attached to a central alpha carbon atom of the
amino acid.
Which of the following statements is NOT true about the different levels of a protein
structure? - ✔The interactions between the side chains of the amino acids make up the
secondary level structure of a protein
Which statement reflects the role that protein structure can play in the disease process?
- ✔Mutation of an active site amino acid changes an enzyme's ability to bind a
substrate.
Aggregation of the proteins is the main reason behind many neurodegenerative
diseases. Which one of the following mutations will likely cause a neurodegenerative
disease? - ✔Replacing a polar amino acid with a non polar amino acid
Which pair (protein interaction and technique) will likely denature a protein? - ✔
Hydrogen bonds/ionic bonds: Change in pH
Which one of the following statements is NOT true about protein structure and stability?
- ✔Protein structure is not stabilized by the hydrophobic effect
Alkaline phosphatase is produced by bone and liver in the human body. The amount of
alkaline phosphatase in blood can help identify if a patient potentially has certain types
of bone and/or liver-related disease, including Paget disease, hepatitis, and certain
types of cancer. The optimal pH range for alkaline phosphatase activity is a pH of 8.0 to
10.0. What happens to the activity of the alkaline phosphatase at a pH of 2? - ✔
Significantly decreases
Inhibitors that have a similar structure to a substrate of an enzyme are most likely to
bind to the enzyme's ____________ and be a ____________ inhibitor. - ✔active site,
competitive
When an inhibitor binds reversibly to a site of the enzyme that is not the active site,
what type of inhibition results? - ✔Noncompetitive inhibition
Chymotrypsin is a digestive enzyme that has optimal activity at a pH of 7.8 and a
temperature of 37oC. Which of the following statements is true? - ✔The reaction rate
for chymotrypsin at a pH of 9.5 is lower than the reaction rate for chymotrypsin at a pH
of 7.8.
