Where are we going with this? The information on this page should increase understanding related to this standard: Evaluate comparative models of various cell type…Evaluate eukaryotic and prokaryotic cells.
In this analogy, the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the key hole (active site) of the lock (enzyme).Smaller keys, larger keys, or incorrectly positioned teeth on keys (incorrectly shaped or sized substrate molecules) do not fit into the lock (enzyme). Only the correctly shaped key opens a particular lock. This is illustrated in graphic on the left. Source, 2021-09-21
- The active site is a region on the enzyme.
- The substrate is the molecule being acted on.
|This enzyme is breaking a compound apart.|
- Competitive inhibition: when a fake substrate binds to the active site which prevents the real substrate from attaching
- Non-competitive inhibition: when a molecule attaches to the enzyme at a place other than the active site
- pH (measure of acidity)
- Amount of substrate
- Salt concentration
Imagine an assembly line that can put together 100 toy cars in an hour. It doesn't matter how fast the assembly line is if there are no wheels to put on. If there are only 8 wheels, only 2 cars can be built.If there are 8,000,000 wheels, then the assembly line can make 100 cars in an hour, but no more.
- You eat mashed potatoes which are full of starch (a polysaccharide).
- Amylase is used to break down starch into glucose.
- Glucose is taken up into your cells by the protein insulin.
- Glucose mixes with oxygen and goes through a series of reactions.
- At the end of this series, ATP Synthase creates ATP which gives your muscles the energy to strum.