2.4 Cell

Passive transport is the movement of substances that does not require _______ as it moves substances down the concentration gradient.

Passive transport is the movement of substances that does not require energy as it moves substances down from a ____ to a _____ concentration

Active transport is the movement of substances that does require energy as it moves substances ______ the concentration gradient.

_______ is the movement of substances from a high to low concentration gradient. E.g. carbon dioxide

_____________ diffusion is the diffusion of substances through transport proteins in the plasma membrane.

Movement of water across a semi-permeable membrane

An active transport which transports large amounts of substances across the membrane. This is into the cell.

Enzymes are _______ that act as biological ________ to increase the rate of reaction by decreasing the ___________ energy required for the reaction.

The part of the enzyme that the substrate binds to, it is specific to a substrate

Enzyme can ________ - this is when the bonds in an enzyme break, which changes the shape of the active site so the substrate can no longer bind to it.