FOUNDATION
Start here if the vocabulary is new. These lessons build the concepts every later topic depends on.
Amino acids
The building blocks, their chemical variety and why order determines everything downstream.
Peptides
What defines a peptide, how length is described and where the boundaries are debated.
Peptides vs proteins
Size, folding and functional differences, and why the distinction is a continuum.
Receptors
How a receptor recognises a molecule and converts that event into a cellular instruction.
Cellular signalling
How information moves between cells and why amplification matters for interpretation.
