2.4 Cell

Passive transport is the movement of substances that does not require (a)   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

(a)  

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

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

(a)   diffusion is the diffusion of substances through transport proteins in the plasma membrane.

Movement of water across a semi-permeable membrane

(a)  

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

(a)  

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

(a)  

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

(a)  

Enzyme can (a)   - 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.