Structure of Proteins Flashcards
Name the 4 different structures of proteins?
Primary.
Secondary.
Tertiary.
Quaternary.
What is the secondary structure of proteins like?
Hydrogen bonds between every N-H group and the oxygen C=0.
11 amino acids long.
What is the tertiary structure of proteins like?
3D structure formed by further bonds.
It has disulphide bonds, ionic bonds and hydrogen bonds.
Disulphide bonds.
Strong.
Not easily broken down.
Hydrogen bonds.
Numerous but very easily broken down.
Ionic bonds.
Easily broken down by changes in pH.
Where do disulphide bonds form?
Between R-groups containing sulphur atoms.
Where do ionic bonds form?
Between R-groups with charges.
What are quarterly structures of protein?
Complex molecules containing many polypeptide chains.
Give 5 examples of a Quaternary structure?
Haemoglobin. Antibodies. Enzyme ATP synthase. Collagen. Actin.
What does haemoglobin consist of?
Four chains arranged in a tetrahedral structure.
What do antibodies consist of?
Four chains arranged in a Y shape.
What does collagen consist of?
Three chains in a triple helix structure.
What does actin consist of?
Hundreds of globular chains arranged in a long double helix.
