When comparing two enzymes against a single substrate it is best
to compare which of the following experimentally determined
values?
kcat
Km
none of these
Vmax
k2
1)Which of the following is true of enzyme characteristics? (a)
enzymes catalyze reactions when a substrate binds to the allosteric
site (b) enzymes catalyze reactions by increasing the activation
energy (c) enzymes do not exhibit specificity and a single enzyme
can catalyze various different reactions (d) enzymes lower the
activation energy of specific reactions, speeding up the reaction
rate
2) Microbial growth is measured by what parameter? (a) increased
cell size (b) increased size of cellular components (c) increase in...
4. The rate with which enzymes can transform a substrate varies
from enzyme to enzyme, and sometimes substrate to substrate. a) How
are competitive and uncompetitive reversible inhibition similar?
How is their effect on rate different? b) Enzyme reaction rates
drop off dramatically as temperatures pass 50 °C or so, and do not
return to their previous rate when cooled. Explain the drop off in
activity and the lack of return to the previously higher reaction
rates after heating. c)...
Briefly explain how Mg2+-dependent enzymes catalyse reactions of
organophosphates such as adenosine triphosphate (ATP) with water
and other nucleophiles.
Non-competitive inhibition of enzymes involve:
a. competition with substrate by binding to the regulatory (or
allosteric) site
b. binding to the enyzme's regulatory (allosteric)
sites and alteration of the structure
c. binding to the enzyme's regulatory (allosteric) site
d. competition with the substrate to the same active
site
e. alteration of the structure of the enzyme
Create a table including the names and functions of the major
enzymes and proteins involved in DNA replication.
1.Enzyme
2.Helicase
3.Primase
4. Topoisomerase
5. DNA polymerase 1
6. DNA polymerase 2
7. DNA polymerase 3
8. Ligase
For Enzymes: what would happen if you increase an enzyme vs
increase substrate concentration ???
For photo synthesis :how are light dependent and light
independent reactions related???