Mac 7: N Flashcards
All are factors that affect enzymatic activity except:
- Pressure
- Substrate Concentration
- Temperature
- pH
-Pressure
Km is simply defined as
- The substrate concentration at half maximal velocity
- The maximal velocity at half the substrate concentration
- None of the above
- A and B
-The substrate concentration at half maximal velocity
____ model states that when the rate or velocity of the reaction is examined under varying substrate concentrations.
- Michaelis-Menten
- Induced Fit Model
- Lock and Key Model
- Hasselhoff-Goldberg
-Michaelis-Menten
A molecule that binds to the enzyme other than the active site
- Competitive inhibitor
- Noncompetitive inhibitor
- Irreversible inhibitor
- Uncompetitive inhibitor
-Noncompetitive inhibitor
The part of the enzyme where the activity takes place
- Binding Site
- Passive Site
- Active Site
- A and B
- A and C
-a and c
True or False
In noncompetitive inhibition, Vmax changes while the Km remains the same.
-True
The substance that attaches to the allosteric enzyme is called a _______ and the site to which it binds is called the ____.
- Activator, Active site
- Regulator, Regulator site
- Promoter, Promoter site
- Inhibitor, Inhibitory site
-Regulator, Regulatory site
True or False
Increasing the substrate concentration will decrease the inhibitory effect of a reversible competitive inhibitor.
-True
True or False
In competitive inhibition, Vmax remains the same while the Km changes.
-True
Which of the following is NOT TRUE about enzymes?
- Ribozymes are not proteins
- They can be denatured like other proteins
- Enzymes are not used up in the reaction.
- They speed up the rate of reaction
-Ribozymes are not proteins
True or False
All enzymes have the same optimum pH.
-False (not same)
The model that explains the mechanism of enzymatic reactions is called
- Rubix Cube Model
- Locke and Key Model
- Lock and Unlock Model
- Lock and Lock Model
-Lock and Key Model
True or False
Enzymes are named after the substrate with the suffix -ase.
-True
The ___________ is a particular point of the reaction coordinate with the highest potential energy. It is the point where the substrates are reacting, therefore it is no longer a reactant but not yet a product.
- Threshold State
- Substrate Absolute Point
- Transition State
- Endpoint
-Transition State
