5.9 Flashcards
1
Q
Zwitterions
A
Ions which have a permanent positive and negative charge but which are neutral overall.
2
Q
Primary structure (protein)
A
Sequence of amino acids joined by peptide links in the chain.
3
Q
Secondary structure (protein)
A
The twisting/coiling of the chain to form a β-pleated sheet/α- helix by intramolecular hydrogen bonding.
4
Q
Tertiary structure
A
The bending/folding of the secondary structure to give a precise 3D shape held together by hydrogen bonding/disulfide bridges/ionic interactions/van der Waals’ forces.
5
Q
Enzyme
A
A protein which is a biological catalyst.
6
Q
Active site
A
The site on the surface of the enzyme into which the substrate fits.
7
Q
Induced fit
A
The substrate induces a change of shape of the active site of the enzyme.
