(Solved): Pyrophosphatase catalyzes the reaction shown in the reaction scheme. To which Main Class does this ...

Pyrophosphatase catalyzes the reaction shown in the reaction scheme. To which Main Class does this enzyme belong?
 

options:

1) Hydrolase

2) Lyase

3) Oxidoreductase

4) Transferase

5) Isomerase

2.

Compare the reaction 2A à P with the reaction A + B à P. Which of the following statements is true?
options:

1) The rate constant k for these reactions have different units

2) The reaction velocity only depends on the concentration of A for both reactions

3) If you double the concentration of A the reaction velocity quadruples for 2AàP, but only doubles for A + B à P

4) 2A àP is unimolecular, while A + B àP is bimolecular

5) The plot of ln[A] versus time is a straight line for both types of reactions