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Think about the binding curve for the enzyme ATCase below. What kind of binding is displayed...
BIOCHEMISTRY PALA (shown below) binds to the active site of ATCase and is an important probe...
BIOCHEMISTRY
PALA (shown below) binds to the active site of ATCase and is an
important probe molecule to study ATCase regulation. PALA acts as
_______________ type of inhibitor and acts to stabilize the
__________-state of the enzyme.
PALA{N-(phosphonasetyl)-L-aspartate.
A) uncompetitive/T
B) competitive/T
C) Uncompetitive/R
D) Competitive/R
E) Noncompetitive/R
HN Cooc Jacooo
What kind of kinetics is observed in an enzymatic reaction, under conditions where the substrate concentration...
What kind of kinetics is observed in an enzymatic reaction, under conditions where the substrate concentration is much higher with respect to KM ([S] >> KM)? Assume that a monomeric and non-allosteric enzyme is considered. A. Cooperative B. First Order C. Zero Order D. The systerm is at equilibrium and no reaction occures E. Second Order
CHEM3250 Assignment-Enzyme Inhibition Consider the data below for an enzyme catalyzed reaction. T...
CHEM3250 Assignment-Enzyme Inhibition Consider the data below for an enzyme catalyzed reaction. The rate of the reaction has been determined with and without an inhibitor. A total concentration of enzyme of 20 uM was used in the experiment. SHOW WORK AND UNITS!!! Without Inhibitor With Inhibitor [substrate] (mM)Rate of formation of te of formation of product product (mM/min) mM/min) 6.67 5.25 0.49 7.04 38.91 1.0 2.2 6.9 41.8 44.0 1.5 3.5 1 a) On the same graph, plot the data...
high and detecting one product at a time Question 77 The initial velocity of an enzyme...
high and detecting one product at a time Question 77 The initial velocity of an enzyme reaction (vo) describes A) The concentration of the enzyme at maximal velocity B) The concentration of substrate at maximal velocity C) The concentration of both at the start of the reaction D) The rate of the reaction when the substrate and enzyme are first med Question 78 What is the shape of a typical plot of initial rate vs substrate concentration tres kinetics? A)...
41. Which of the following statements about protein-ligand binding is correct? A) The K is equal...
41. Which of the following statements about protein-ligand binding is correct? A) The K is equal to the concentration of ligand when all of the binding sites are occupied. B) The K is independent of such conditions as salt concentration and pH. C) The larger the K. (association constant), the weaker the affinity. D) The larger the K. the faster is the binding. E) The larger the K, the smaller the K. (dissociation constant) 42. The ability of O, to...
Problem 3: A) Draw the mechanistic modifications associated with chymotripsin enzyme and its substrate up to...
Problem 3: A) Draw the mechanistic modifications associated with chymotripsin enzyme and its substrate up to the formation of acyl enzyme intermediate. Specify the role of each of the amino acids in the catalytic triad. B) Provide a Michaelis-Menten rate-law equation. Subsequently, on the same graph draw Lineweaver-Burk plots for i) enzyme which is not inhibited: ii) enzyme inhibited by a non-competitive inhibitor, C) The Km and kcat for hexokinase with as a glucose substarte are 5-10 M and 8-10²...
Scatchard analysis may give information about? O A. the ligand binding constant (Kb) of a protein,...
Scatchard analysis may give information about? O A. the ligand binding constant (Kb) of a protein, OB. the number of ligand binding sites on a protein, the type of homotropic cooperativity with ligand binding, OD. Bmax: O E. all of the above, OF. none of the above. In glycolysis, fructose 1,6-bisphosphate is converted to two products with a AG'º of 23.8 kJ/mol. Under what conditions encountered in a normal cell will the free-energy change (AG) be negative, enabling the reaction...
Please answer ALL questions or I'll thumbs down! 2) Imagine an enzyme that has a histidine...
Please answer ALL questions or I'll thumbs
down!
2) Imagine an enzyme that has a histidine in the substrate binding pocket that regulates substrate binding based on its protonation state to control enzyme function. Substrates can only bind in the unprotonated state; in other words, substrate binding is blocked when the histidine is protonated and when the substrate is bound, the histidine cannot be protonated. This enzyme exhibits classical Michaelis-Menten behavior. a) Assume that the pka of the histidine in...
The key factor that controls the initial rate of an enzyme catalysed reaction (Vo) is the...
The key factor that controls the initial rate of an enzyme catalysed reaction (Vo) is the concentration of the substrate of the reaction ([S]). In Damon's Michaelis-Menten experiment, the highest concentration of substrate used was 500 UM. What do you think will happen to the reaction velocity if higher concentrations of substrate were used? Select one: a. Vo will reach a plateau at higher (S) values O b. Vo will increase exponentially as (S) is increased O c. Vo will...
Consider the trypsin binding-pocket specificity structure scenario and critical AAs interactions ...
Consider the trypsin binding-pocket specificity structure scenario and critical AAs interactions within: G226-D189-G216 (see L3, slide 26): a single nucleotide polymorphism within the D189 codon resulted in a first nucleotide Guanine replacement by Cytosine. What is the consequence of this mutation relative to binding pocket- substrate specificity? (3 pts) 5. You work at the infamous enzymology lab; a colleague asks you to evaluate her enzyme activity data test based on the efficacy of two inhibitors, each at the [10 mM]...
BIOCHEMISTRY
PALA (shown below) binds to the active site of ATCase and is an
important probe molecule to study ATCase regulation. PALA acts as
_______________ type of inhibitor and acts to stabilize the
__________-state of the enzyme.
PALA{N-(phosphonasetyl)-L-aspartate.
A) uncompetitive/T
B) competitive/T
C) Uncompetitive/R
D) Competitive/R
E) Noncompetitive/R
HN Cooc Jacooo
CHEM3250 Assignment-Enzyme Inhibition Consider the data below for an enzyme catalyzed reaction. The rate of the reaction has been determined with and without an inhibitor. A total concentration of enzyme of 20 uM was used in the experiment. SHOW WORK AND UNITS!!! Without Inhibitor With Inhibitor [substrate] (mM)Rate of formation of te of formation of product product (mM/min) mM/min) 6.67 5.25 0.49 7.04 38.91 1.0 2.2 6.9 41.8 44.0 1.5 3.5 1 a) On the same graph, plot the data...
high and detecting one product at a time Question 77 The initial velocity of an enzyme reaction (vo) describes A) The concentration of the enzyme at maximal velocity B) The concentration of substrate at maximal velocity C) The concentration of both at the start of the reaction D) The rate of the reaction when the substrate and enzyme are first med Question 78 What is the shape of a typical plot of initial rate vs substrate concentration tres kinetics? A)...
41. Which of the following statements about protein-ligand binding is correct? A) The K is equal to the concentration of ligand when all of the binding sites are occupied. B) The K is independent of such conditions as salt concentration and pH. C) The larger the K. (association constant), the weaker the affinity. D) The larger the K. the faster is the binding. E) The larger the K, the smaller the K. (dissociation constant) 42. The ability of O, to...
Problem 3: A) Draw the mechanistic modifications associated with chymotripsin enzyme and its substrate up to the formation of acyl enzyme intermediate. Specify the role of each of the amino acids in the catalytic triad. B) Provide a Michaelis-Menten rate-law equation. Subsequently, on the same graph draw Lineweaver-Burk plots for i) enzyme which is not inhibited: ii) enzyme inhibited by a non-competitive inhibitor, C) The Km and kcat for hexokinase with as a glucose substarte are 5-10 M and 8-10²...
Scatchard analysis may give information about? O A. the ligand binding constant (Kb) of a protein, OB. the number of ligand binding sites on a protein, the type of homotropic cooperativity with ligand binding, OD. Bmax: O E. all of the above, OF. none of the above. In glycolysis, fructose 1,6-bisphosphate is converted to two products with a AG'º of 23.8 kJ/mol. Under what conditions encountered in a normal cell will the free-energy change (AG) be negative, enabling the reaction...
Please answer ALL questions or I'll thumbs
down!
2) Imagine an enzyme that has a histidine in the substrate binding pocket that regulates substrate binding based on its protonation state to control enzyme function. Substrates can only bind in the unprotonated state; in other words, substrate binding is blocked when the histidine is protonated and when the substrate is bound, the histidine cannot be protonated. This enzyme exhibits classical Michaelis-Menten behavior. a) Assume that the pka of the histidine in...
The key factor that controls the initial rate of an enzyme catalysed reaction (Vo) is the concentration of the substrate of the reaction ([S]). In Damon's Michaelis-Menten experiment, the highest concentration of substrate used was 500 UM. What do you think will happen to the reaction velocity if higher concentrations of substrate were used? Select one: a. Vo will reach a plateau at higher (S) values O b. Vo will increase exponentially as (S) is increased O c. Vo will...
Consider the trypsin binding-pocket specificity structure scenario and critical AAs interactions within: G226-D189-G216 (see L3, slide 26): a single nucleotide polymorphism within the D189 codon resulted in a first nucleotide Guanine replacement by Cytosine. What is the consequence of this mutation relative to binding pocket- substrate specificity? (3 pts) 5. You work at the infamous enzymology lab; a colleague asks you to evaluate her enzyme activity data test based on the efficacy of two inhibitors, each at the [10 mM]...
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