1. In the following reaction, a molecule of ATP bound to the enzyme transfer a phosphate to fructose according to the re

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1. In the following reaction, a molecule of ATP bound to the
enzyme transfer a phosphate to fructose according to the reaction
shown below enzyme-ATP + fructose ⇋ fructose-phosphate +
enzyme-ADP
When this enzyme catalyze the reaction, the activation energy
barrier changes by 27.6 kJ/mol for the forward rate constant. How
will the activation energy barrier change for the reverse rate
constant in this catalyzed reaction?
Select one:
a. The change in the activation energy barrier is the same: 27.6
kJ/mol
b. The change in the activation energy barrier is greater than
27.6 kJ/mol
c. The change in the activation energy barrier is less than 27.6
kJ/mol
2. Hydrolysis reactions (sugars, proteins, nucleic acids, fats)
in general are considered first order reactions despite that each
of these molecules react with a molecule water. For example
sucrose + H2O →→ fructose + glucose
Why?
Select one:
a. Water is in excess and the concentration does not change on
time, so the constant concentration value is incorporated into the
rate constant
b. It is not known
c. hydrolysis reactions are not reversible
d. Only occur in the presence of enzymes