Mcb 450 Exam 3 Lon-Capa Questions
And Answers With Verified Solutions
100% Correct!!!
Which of the following best describes the Km of an enzymatic reaction?
The amount of enzyme needed to consume all the substrate
How much substrate inhibits the enzyme by 50%
The rate at which the substrate binds the enzyme
The concentration of substrate needed to reach the Vmax
The concentration of substrate needed to reach ½ the Vmax - ANSWER✔✔ (PL 13)
The concentration of substrate needed to reach ½ the Vmax
Which of the following is true about the transition state of an enzymatic reaction?
The free energy of the transition state is increased by the enzyme
The transition state has the lowest amount of free energy
The state when the molecule being modified by the enzyme is neither the original
substrate nor final product
The difference in free energy between the transition state and the substrate is
called the free energy of the reaction
When the transition energy is lowered, there are fewer molecules that will
become the final product - ANSWER✔✔ (PL 13) The state when the molecule
being modified by the enzyme is neither the original substrate nor final product
Carbohydrates are less-efficient fuel sources than fats because the carbon in
carbohydrates is more:
,oxidized
electrophilic
acidic
basic
hydrophobic - ANSWER✔✔ (PL 14) oxidized
Which of the following carries a hydride in catabolic pathways?
NADH
NADPH
Biotin
Coenzyme A
FADH2 - ANSWER✔✔ (PL 14) NADH
In a metabolic pathway, a reaction that best serves as a committed step:
Is a near equilibrium reaction.
Follows Michaelis-Menten kinetics.
Has a large negative ΔG.
Is shared amongst at least two pathways.
Can be easily reversible.
Has to be the last step of the pathway. - ANSWER✔✔ (HW 7) Has a large negative
ΔG.
, The electrons released during oxidation reactions cannot be captured by:
FAD
NAD+
NADH - ANSWER✔✔ (HW 7) NADH
How many protons and electrons can the following molecule accept:
Molecule: FMN
Electrons: ___ - ANSWER✔✔ (HW 7) 2
How many protons and electrons can the following molecule accept:
Molecule: FMN
Protons: ___ - ANSWER✔✔ (HW 7) 2
ATP is organized in ATPase enzyme pockets by multiple interactions including:
The coordinated Mg2+ polarizes the gamma-phosphate.
The Walker A motif directly binds the beta-phosphate.
Arginine polarizes the nucleophilic water.
Walker A and B amino acids coordinate an essential Mg2+.
All of the above are correct. - ANSWER✔✔ (HW 7) Walker A and B amino acids
coordinate an essential Mg2+.
And Answers With Verified Solutions
100% Correct!!!
Which of the following best describes the Km of an enzymatic reaction?
The amount of enzyme needed to consume all the substrate
How much substrate inhibits the enzyme by 50%
The rate at which the substrate binds the enzyme
The concentration of substrate needed to reach the Vmax
The concentration of substrate needed to reach ½ the Vmax - ANSWER✔✔ (PL 13)
The concentration of substrate needed to reach ½ the Vmax
Which of the following is true about the transition state of an enzymatic reaction?
The free energy of the transition state is increased by the enzyme
The transition state has the lowest amount of free energy
The state when the molecule being modified by the enzyme is neither the original
substrate nor final product
The difference in free energy between the transition state and the substrate is
called the free energy of the reaction
When the transition energy is lowered, there are fewer molecules that will
become the final product - ANSWER✔✔ (PL 13) The state when the molecule
being modified by the enzyme is neither the original substrate nor final product
Carbohydrates are less-efficient fuel sources than fats because the carbon in
carbohydrates is more:
,oxidized
electrophilic
acidic
basic
hydrophobic - ANSWER✔✔ (PL 14) oxidized
Which of the following carries a hydride in catabolic pathways?
NADH
NADPH
Biotin
Coenzyme A
FADH2 - ANSWER✔✔ (PL 14) NADH
In a metabolic pathway, a reaction that best serves as a committed step:
Is a near equilibrium reaction.
Follows Michaelis-Menten kinetics.
Has a large negative ΔG.
Is shared amongst at least two pathways.
Can be easily reversible.
Has to be the last step of the pathway. - ANSWER✔✔ (HW 7) Has a large negative
ΔG.
, The electrons released during oxidation reactions cannot be captured by:
FAD
NAD+
NADH - ANSWER✔✔ (HW 7) NADH
How many protons and electrons can the following molecule accept:
Molecule: FMN
Electrons: ___ - ANSWER✔✔ (HW 7) 2
How many protons and electrons can the following molecule accept:
Molecule: FMN
Protons: ___ - ANSWER✔✔ (HW 7) 2
ATP is organized in ATPase enzyme pockets by multiple interactions including:
The coordinated Mg2+ polarizes the gamma-phosphate.
The Walker A motif directly binds the beta-phosphate.
Arginine polarizes the nucleophilic water.
Walker A and B amino acids coordinate an essential Mg2+.
All of the above are correct. - ANSWER✔✔ (HW 7) Walker A and B amino acids
coordinate an essential Mg2+.
