How do enzymes speed up chemical reactions? enzymes
a. lower the activation energy of chemical reactions.
b. raise the temperature of the cell, speeding chemical reactions.
c. store atp, allowing more energy to be used in chemical reactions.
d. act as miniature 'transfer trucks', gathering materials for chemical reactions, and placing them together.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.