Bch211 - Exam 2
Study for final
- 1.True or false: Enzymes, being proteins, are sensitive to temperature and will be denatured by high temperatures.
- A.
True
- B.
False
- 2.True or false: Energy is generally consumed during anabolism
- A.
True
- B.
False
- 3.True or false: Aspirin acts as an reversible inhibitor of the COX 2 enzyme
- A.
True
- B.
False
- 4.Which of the following is a common function of many vitamins in the body?
- A.
Substrates
- B.
Activators
- C.
Apoenzymes
- D.
Coenzymes
- 5.A metal ion required for enzyme activity is called
- A.
Proenzyme
- B.
A zymogen
- C.
A cofactor
- D.
A substrate
- 6.Sugars which contain an aldehyde group that can be oxidized are called
- A.
Glycosides
- B.
Simple sugars
- C.
Reducing sugars
- D.
Oxidizing sugars
- 7.The cyclic form of glucose results from the formation of
- A.
A hemiacetal
- B.
An acetal
- C.
An amide
- D.
An ester
- 8.The carbohydrate below may be classified as
- A.
A ketohexose
- B.
An aldopentose
- C.
A ketopentose
- D.
An aldohexose
- 9.The conditions required for maximum enzyme function are called:
- A.
Optimum conditions
- B.
Low pressure, high temperature
- C.
Room conditions
- D.
Standard conditions
- 10.The synthesis of an enzyme in response to a cellular need is called
- A.
Allosteric production
- B.
Feedback control
- C.
Biofeedback
- D.
Enzyme induction
- 11.
![The following compounds are enantiomers of each other - ProProfs]( "The following compounds are enantiomers of each other")
The following compounds are enantiomers of each other- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
- 12.A monosaccharide used to form nucleic acids is
- A.
Ribose
- B.
Maltose
- C.
Galactose
- D.
Glucose
- 13.Lineweaver Burke - If everything else has a higher slope, anything lower than it represents the activation space. everything above it represents the inhibition space Gibbs free energy delta G(negative - ) = spontaneous delta G(positive +) = nonspontaneous
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
- 14.Which form of monosaccharides is preferred by human cells?
- A.
Both D and L
- B.
D
- C.
L
- D.
Neither D nor L
- 15.Refer to Exhibit 6A. "Hindrate" is an inhibitor of triose phosphate isomerase. When it is added to cells at a concentration of 0.1 nM, the enzyme's Km for the substrate is unchanged, but the apparent Vmax is altered to 50nM/sec.
- A.
This is an uncompetitive inhibitor
- B.
This is a noncompetitive inhibitor
- C.
This is a competitive inhibitor
- D.
This is an irreversible inhibitor
- 16.The structure below is shown in what anomeric form?
- A.
B (beta)
- B.
Cis
- C.
Trans
- D.
Alpha
- 17.A short description of a diastereomer would be?
- A.
Diastereomers are those compounds that can only have 6 chiral carbons
- B.
Diastereomers are all of the isomers for compounds that can have two or more chiral centers
- C.
Diastereomers are isomers that only have 1 chiral center.
- D.
Diastereomers are isomers that are mirror images of the other
- 18.Which of the following is correctly called a complex carbohydrate?
- A.
Starch
- B.
Sucrose
- C.
Fructose
- D.
Lactose
- 19.If an inhibitor changes the slope of the Lineweaver-Burk graph, but not the x-intercept, it is this type of inhibition:
- A.
You cannot tell from the data given
- B.
Competetive
- C.
Irreversible inhibition
- D.
Non-competitive
- E.
More than one answer is correct
- 20.
![Draw the structure of B-D-Lactose in the Hawarth projection - ProProfs]( "Draw the structure of B-D-Lactose in the Hawarth projection")
Draw the structure of B-D-Lactose in the Hawarth projection- A.
Is this a reducing sugar? (YES)
- B.
1 pt for placing the beta structure
- C.
1 pt for the glycosidic linkage
- D.
2 pts for each sugar
- 21.Which of the following is true of a noncompetitive inhibitor?
- A.
Resembles the substrate
- B.
Binds at a site other than the active site
- C.
Reduces Km
- D.
Increases Vmax
- 22.Which of the following terms is a general definition of an enzyme?
- A.
A catalyst
- B.
An activator
- C.
A carbohydrate
- D.
A lipid
- 23.Structurally, glycogen is most similar to
- A.
Sucrose
- B.
Amylopectin
- C.
Amylose
- D.
Cellulose
- 24.Which of the following enzyme properties is explained by the lock-and-key model?
- A.
High molecular weight
- B.
Specificity
- C.
Susceptibility to denaturation
- D.
High turnover rate
- 25.The simplest carbohydrates are called
- A.
Polysaccharides
- B.
Oligosaccharides
- C.
Disaccharides
- D.
Monosaccharides
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