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16 Cards in this Set

  • Front
  • Back
What are proteins composed of?
either a single polypeptide chain or a combination of two or more polypeptide chains
What kinds of bonds secure the precise folding of a protein
Hydrogen bonds, Ionic bonds, Van der Waals forces and hydrophobic attractions
The bonds of proteins are senstive to what?
to temperature and pH
How is the active site pocket formed
is formed as a direct result of the precise folding of the polypeptide chains. Thus the enzymes shape determines its function ,
What happens if a proteins shape changes
The active site may be distored or lost altogether, rendering the protein non-functioning.
How does a protein function optimally?
at a specific temperature, pH and salinity.
A change in an enzymes environment can alter what rate
The rate of product formation.
If the amount of enzyme is not limiting, what will happen to the rate of substrate conversion into product?
It should increase with increasing concentration of substrate.
What happens if you keep adding substrate while keeping the enzyme concentration constant?
The product will reach a maximum value, because all ezymes are occupied with substrate.
What types of molecules compete with enzymes to occupy the active sites? and how can they do this
competitive inhibitors, because they mimic the size, charge distribution and shape of the natural substrate
What happens if there is the presence of a competitive inhibitor?
There will be a reduction in the rate of product formation because the competitive inhibitor bound to the enzyme will not be converted into product.
Which inhibitors do not bind to the active site, but alter its shape and hence the shape of its active site?
non-competitive inbibitors.
In the experiment, we are using which scale to measure temperature? What is RT
Celcius, RT is room temperature.
what is the substrate used in the Lab
p-nitrophenyl phosphate
In the control group, we use the deonized water in place of what?
The enzyme solution.
In the experiment, what is the inhibitor used?
KH2PO4 (potassium dihydrogen phosphate)