Flashcards in chapter 3 Deck (8):
What do catalysts do?
Catalysts alter the rate of a chemical reaction without undergoing permanent changes themselves. They can be used repeatedly and are therefore effective in small amounts.
What is activation energy?
An initial boost of energy that is needed to kick start the reaction. It is the minimum amount of energy needed to activate the reaction.
What is an active site?
The small region of the enzyme that is functional which is made up of a relatively small number of amino acids. It forms a small, hollow depression within the much larger enzyme molecule
What is the substrate?
The molecule on which the enzyme acts
How is the enzyme-substrate complex formed?
The substrate molecule is held within the active site by bonds that temporarily form between certain amino acids of the active site and groups on the substrate molecule.
Why is the induced fit model a better explanation of the scientific observations?
- it explains how other molecules can affect enzyme activity
- how the activation energy is lowered
What does the competitive inhibitor do?
A competitive inhibitor will block the enzyme's active site (ie: it will occupy the same space as the natural substrate, blocking it from being catalyzed)