ASAP Need CORRECT Penn foster answer

What's developed as a result of the electron transport chain?
A. Membrane potential
B. Proton gradient
C. Phospholipid bilayer
D. New cells
I can't tell if it's proton gradient or Membrane potential

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

Which nucleotide component contains nitrogen

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?