Which of the following statements is true about a hypothesis?

a. a hypothesis is always true.
b. a hypothesis is always false.
c. a hypothesis will become a scientific law.
d. a hypothesis is a prediction of what you believe to be true.

List four observations that indicate that a chemical reaction may be taking place

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

Which statement best describes the function of enzymes?