Unit 2 - KA1 - Metabolic Pathways and their Control Flashcards
Metabolic activity which synthesises (builds up) complex molecules, requires energy.
Anabolic
Metabolic activity which breaks down complex molecules, releases energy.
Catabolic
Small membrane bound region of a cell.
Compartment
Sequence of chemical reaction in a cell, controlled by enzymes
Metabolic Pathway
All of the metabolic pathways in an organism
Metabolism
Membrane of the cell made from phospholipid molecules and proteins
Phospholipid membrane
A gap in the membrane caused by a channel forming protein.
Pore
A protein found in the phospholipid membrane which carries molecules across via active transport.
Protein pump
The energy required to start a chemical reaction
Activation Energy
The region of an enzyme which allows the substrate to bind
Active Site
Occurs when a substance that is similar to the substrate binds to the active site and slows down the chemical reaction.
Can be reversed by increasing the substrate concentration.
Competitive inhibitor
Occurs when the end product of an enzyme reaction slows down the rate of reaction.
Feedback inhibition
A change to the active site caused by the substrate molecule to allow for a better fit.
Induced fit
Occurs when a substance binds to a part of an enzyme that is not the active site, altering the shape of the active site and therefore slowing the rate of reaction.
Non-competitive inhibition
The result of an enzyme catalysed reaction
Product
