15 Questions
What is the role of the active site in an enzyme?
It is where the substrate molecule binds and undergoes catalytic transformation
What is a defining property of enzymes in terms of substrate specificity?
They can bind only one substrate
What is the function of the amino acid residues in the active site of an enzyme?
To bind the substrate and catalyze its chemical transformation
What is the role of water-soluble vitamins in enzymatic reactions?
To bind to the active site as coenzymes
How do enzymes increase the speed of a chemical reaction?
By creating tension between the substrate and catalytic residues
What allows enzymes to have high specificity in their catalytic activity?
Their ability to bind only one specific substrate
What is the function of enzymes in a chemical reaction?
Increasing reaction rates and lowering reaction activation barriers
What is the maximum rate of a reaction when the enzyme is saturated with substrate?
Vmax
In enzymatic kinetics, what does V0 represent?
The rate of a reaction and how it changes with experimental parameters
Which factor does NOT affect the reaction rate in enzymatic kinetics?
Vmax
What is the characteristic feature of a regulatory enzyme?
Undergoes change in catalytic activity by allosteric mechanisms or covalent modification
What is the specific site on an allosteric protein molecule to which the modulator or effector molecule binds?
Allosteric site
In reversible covalent modification, which process modulates the activity of the enzyme?
Phosphorylation
What is the protein portion of an enzyme called?
[E] (enzyme concentration)
What type of molecule is coenzyme Q?
[Cofactor]
Explore the concept and importance of enzymes in biological reactions, including the role of water-soluble vitamins as coenzymes and the regulation of enzyme activity. Learn about the structure of enzymes, their active sites, and how their catalytic activity depends on their native protein conformation.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
