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The MYP MYP Biology Key Definitions is a vital reference for MYP MYP Biology students (both SL and HL), offering a curated collection of critical terminology and phrases aligned with the MYP curriculum. Designed to support you in Paper 1, Paper 2, and Paper 3, this resource ensures you have the right language tools at your fingertips.
On this page, you'll find an organized list of essential terms, complete with clear definitions, -specific usage, and examiner-focused context that helps you build confidence in understanding and applying subject-specific vocabulary.
With Jojo AI integration, you can reinforce learning through quizzes, contextual examples, or targeted term practice. Perfect for coursework, written assignments, oral exams, or exam preparation, RevisionDojo's MYP MYP Biology Key Definitions equips you with precise language knowledge to excel in MYP assessments.
3D tissue printing
A technique that uses living cells and biomaterials to build biological structures layer by layer.
Abiotic factors
Nonliving environmental conditions such as temperature, light, pH, and moisture.
Activation energy
The minimum amount of energy required for reactant molecules to start a chemical reaction.
Active site
The region of an enzyme where the substrate binds and the reaction takes place.
Adaptations
Traits that improve an organism’s chances of surviving and reproducing in its environment.
Allopatric speciation
Speciation caused by geographical separation.
Antibody
A protein produced by B lymphocytes that binds to a specific antigen to help neutralize it.
Antigen
A molecule, usually a protein, that is recognised as foreign by the immune system and triggers an immune response.
ATP
A small molecule that stores and releases energy for cell processes.
Bioaccumulation
Pollutants building up in an organism’s tissues over time.
Biomagnification
Pollutant concentrations increase at higher trophic levels.
Biomass
Living material that contains stored chemical energy.
Bioreactor
A controlled system that supplies oxygen, nutrients, and conditions needed for living cells to survive and grow.
Biotic factors
Interactions with living organisms, such as food availability, predators, competitors, and symbiotic partners.
Cell cycle
The sequence of events that a cell goes through from one division to the next. Cells alternate between growing (interphase) and dividing.
Cell division
The process by which one cell splits into two daughter cells. This is essential for growth, repair, and reproduction.
Cell membrane
A selectively permeable phospholipid bilayer with embedded proteins that surrounds all cells, controlling the movement of substances in and out of the cell.
Cell wall
A rigid structural layer composed primarily of cellulose (in plants) that surrounds the cell membrane, providing mechanical support and protection.
Cellular respiration
A chemical process that releases energy from glucose.
Chemical bond
The force that holds atoms together in molecules.
Chemical energy
Energy stored inside the bonds of molecules such as glucose. Organisms release this energy during respiration.
Chemical reaction
A process in which atoms in molecules are rearranged to form new substances with different properties.
Chloroplasts
Double-membrane-bound organelles found in plant cells and algae containing chlorophyll, which are the site of photosynthesis.
Cloning
The process of producing genetically identical copies of a cell or organism using natural or artificial methods.
