BSC 108 The Working Cell Worksheet
Describe energy coupling. - ANS-use of energy released from exergonic reactions to drive
essential endergonic reactions
Give an example of diffusion. - ANS-imagine many molecules of perfume inside a bottle. If
you remove the bottle top, every molecule of perfume will move randomly about, but the
overall movement will be out of the bottle and the whole room will eventually smell of
perfume
How does active transport differ from passive transport? - ANS-active requires NRG and
passive does not
If an animal cell is place in a hypotonic solution, what happens to the cell? - ANS-the cell
would gain water, swell and possibly burst
Is chemical energy considered kinetic or potential energy? - ANS-potential energy
State the principle of conservation of energy. - ANS-is is not possible to destroy or create
energy
What does ATP stand for? - ANS-adenosine triphosphate
What function does ATP serve inside cells? - ANS-acts like an energy shuttle, storing
energy obtained from food and then releasing it as needed at a later time
What is a substrate? - ANS-specific molecule that an enzyme acts on
What is an active site? - ANS-the part of an enzyme molecule where a substrate molecule
attacheds - typically a pocket or groove on the enzyme's surface
What is diffusion? Diffusion is the uniform movement of molecules into the available space.
What is osmosis? - ANS-the diffusion of water across a selectively permeable membrane
ANS-endocytosis is the process by which a cell membrane surrounds a particle and
encloses the particle in a vesicle to bring the particle into the cell. This is the difference
between endocytosis and exocytosis. exocytosis is the process by which a substance is
released from the cell through a vesicle that transport the substance to the cell surface and
then fuses with the membrane to let the substance out
What is the difference between kinetic energy and potential energy? - ANS-kinetic energy is
the energy of motion
Potential energy is energy that is stored. What is the function of an enzyme? - ANS-serves
as a biological catalyst, changing the rate of a chemical reaction without itself being changed
in the process
Describe energy coupling. - ANS-use of energy released from exergonic reactions to drive
essential endergonic reactions
Give an example of diffusion. - ANS-imagine many molecules of perfume inside a bottle. If
you remove the bottle top, every molecule of perfume will move randomly about, but the
overall movement will be out of the bottle and the whole room will eventually smell of
perfume
How does active transport differ from passive transport? - ANS-active requires NRG and
passive does not
If an animal cell is place in a hypotonic solution, what happens to the cell? - ANS-the cell
would gain water, swell and possibly burst
Is chemical energy considered kinetic or potential energy? - ANS-potential energy
State the principle of conservation of energy. - ANS-is is not possible to destroy or create
energy
What does ATP stand for? - ANS-adenosine triphosphate
What function does ATP serve inside cells? - ANS-acts like an energy shuttle, storing
energy obtained from food and then releasing it as needed at a later time
What is a substrate? - ANS-specific molecule that an enzyme acts on
What is an active site? - ANS-the part of an enzyme molecule where a substrate molecule
attacheds - typically a pocket or groove on the enzyme's surface
What is diffusion? Diffusion is the uniform movement of molecules into the available space.
What is osmosis? - ANS-the diffusion of water across a selectively permeable membrane
ANS-endocytosis is the process by which a cell membrane surrounds a particle and
encloses the particle in a vesicle to bring the particle into the cell. This is the difference
between endocytosis and exocytosis. exocytosis is the process by which a substance is
released from the cell through a vesicle that transport the substance to the cell surface and
then fuses with the membrane to let the substance out
What is the difference between kinetic energy and potential energy? - ANS-kinetic energy is
the energy of motion
Potential energy is energy that is stored. What is the function of an enzyme? - ANS-serves
as a biological catalyst, changing the rate of a chemical reaction without itself being changed
in the process
