Which of the following does NOT describe catalysts? A
They are usually proteins.

B
They increase the speed of a chemical reaction.

C
They are permanently altered in a chemical reaction.

D
They are substrate specific.

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.