Enzymes Flashcards
Enzyme-driven metabolic pathways can be made more efficient by
- Concentrating enzymes within specific cellular compartments
- Grouping enzymes into free-floating, multienzyme complexes
- Fixing enzymes into membranes so that they are adjacent to each other
Common feature on all serine proteases is a:
Single reactive serine residue
Before they can react, many molecules need to be destabilized. This state is typically achieved through:
The input of a small amount of activation energy
What are serine proteases?
- Chymotrypsin
- Trypsin
- Elastase
The catalytic activity of an enzyme is restricted to its small portion called:
Active site
An activated enzyme made of polypeptide chain and a co-factor is
Holoenzyme
An enzyme are sensitive to:
Changes in pH and changes in temperature
The “lock and key” model of enzyme action illustrates that a particular enzyme molecule
Interacts with a specific type of substrate molecule
Enzyme functions as
Organic catalyst
Many enzymes functions by ——- the activation energy of reactions
Lowering
An uncatalysed reaction requires a
Higher activation energy
The first step in any reaction catalysed by an enzyme is the formation of a specific association between the molecules called an
Enzyme-subrate complex.
The function of competitive inhibitors by their ability to interact or bind to
The active site of an enzyme
Which one inactivates an enzyme by indirectly changing the shape of the active site of an enzyme
Non-competitve inhibitor
What is a cofactor?
- Inorganic ions
- Organic molecules
