chapter 6 animation assessment : kinetic and potential energy

which of the choices is an example of potential energy? -an electrochemical gradient across the cell membrane -chemical transport, as in the sodium potassium pump -contraction of a muscle cell -flow of calcium ions through a membrane channel

an electrochemical gradient across the cell membrane

which of the choices is an example of kinetic energy? -water behind a dam -gasoline in an auto gas tank -a ball at the top of stairs -a photon of light

photon of light

many cellular processes represent work that requires the expenditure of energy. which of the actions is not a cellular process that requires the cell to expend energy?

diffusion of water into cells

which of the factors accounts for the higher potential energy of a C-C and C-H bonds compared to C-O and H-O bonds?

the C-C and C-H bonds are weak, thus requiring a lot of energy to hold together