BIOL 3030 Exam Questions and Answers
Correct 80
Incorrect 00
0
Your answers
1 of 80
Term
how does a catalyst affect the overall dG of an endergonic reaction?
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it allows reacting molecules to more
transition states
easily form the transition state
positive, negative it has no effect
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2 of 80
,Term
if the Asp in the chymotrypsin active site was mutated to another amino
acid, which of the following would be considered an invisible mutation
in that it is least likely to impact the function of the enzyme?
- Asp-> Asn
- Asp-> Glu
- Asp-> His
- Asp-> Ser
- Asp-> Lys
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2, 3, 4 4>5>2>1>3
amine (NH2) Asp-> Glu
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3 of 80
Term
What can cause the opening or closing of a gated ion channel?
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, it allows reacting molecules to more pH change, phosphorylation,
easily form the transition state voltage change, ligand binding
glycerophospholipids it has no effect
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4 of 80
Definition
6.82
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The Michaelis constant Km is defined as :
1. (k-1+k2)/k1
2. the [S] that half-saturates the enzyme
3. the rate velocity at one-half vmax
4. [ES]/[E][S]
at pH 3, how many charged groups are present in the pentapeptide Ala-Asp-His-
Ser-Lys?
if the pK values for phosphoric acid are 2.15, 6.82, and 12.38, at what pH would
one observe equal amounts of H2PO4- and HPO42-?
given pKa values of 2.1, 9.8, and 3.9 (side chain) what is the pI of aspartic acid?
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5 of 80
Term
For a cell with [Na+]out= 150mM and [Na+]in= 15mM at 37 C, what is the
free energy for movement of sodium ions from outside the cell to
inside if the potential across the membrane is -60 mV?
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Gly; Pro cooperativity
-11.7 kJ/mol Leu; Ser
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6 of 80
Definition
8*10^7 min-1
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The idea that binding of one
molecule of oxygen to hemoglobin
Correct 80
Incorrect 00
0
Your answers
1 of 80
Term
how does a catalyst affect the overall dG of an endergonic reaction?
Give this one a try later!
it allows reacting molecules to more
transition states
easily form the transition state
positive, negative it has no effect
Don't know?
2 of 80
,Term
if the Asp in the chymotrypsin active site was mutated to another amino
acid, which of the following would be considered an invisible mutation
in that it is least likely to impact the function of the enzyme?
- Asp-> Asn
- Asp-> Glu
- Asp-> His
- Asp-> Ser
- Asp-> Lys
Give this one a try later!
2, 3, 4 4>5>2>1>3
amine (NH2) Asp-> Glu
Don't know?
3 of 80
Term
What can cause the opening or closing of a gated ion channel?
Give this one a try later!
, it allows reacting molecules to more pH change, phosphorylation,
easily form the transition state voltage change, ligand binding
glycerophospholipids it has no effect
Don't know?
4 of 80
Definition
6.82
Give this one a try later!
The Michaelis constant Km is defined as :
1. (k-1+k2)/k1
2. the [S] that half-saturates the enzyme
3. the rate velocity at one-half vmax
4. [ES]/[E][S]
at pH 3, how many charged groups are present in the pentapeptide Ala-Asp-His-
Ser-Lys?
if the pK values for phosphoric acid are 2.15, 6.82, and 12.38, at what pH would
one observe equal amounts of H2PO4- and HPO42-?
given pKa values of 2.1, 9.8, and 3.9 (side chain) what is the pI of aspartic acid?
, Don't know?
5 of 80
Term
For a cell with [Na+]out= 150mM and [Na+]in= 15mM at 37 C, what is the
free energy for movement of sodium ions from outside the cell to
inside if the potential across the membrane is -60 mV?
Give this one a try later!
Gly; Pro cooperativity
-11.7 kJ/mol Leu; Ser
Don't know?
6 of 80
Definition
8*10^7 min-1
Give this one a try later!
The idea that binding of one
molecule of oxygen to hemoglobin
