Protein Shape/function Flashcards
What does a proteins shape determine?
Function
Haemoglobin compact soluble protein - easy transport to carry oxygen around body.
Different proteins have …
Different structures … different shapes .. different specialised jobs.
Give 4 examples of proteins?
Enzymes.
Antibodies.
Transport proteins.
Structural protein.
Why are enzymes spherical?
Due to tight folding polypeptide chains.
Name a role of an enzyme ?
Soluble so have roles in metabolism
Digestive enzymes break down large food molecules and then other enzymes help to synthesise large molecules.
Role of antibodies ?
Involved in immune response.
Location of antibodies.
Found in blood.
Structure of antibodies.
2 light / short polypeptides Chains.
2 heavy / long polypeptides bonded together.
What makes antibodies different?
Their variable regions as the amino acid structure varies here.
Example of transport proteins.
Channel proteins. In cel membrane.
Structure of channel proteins.
Hydrophobic and hydrophilic amino acids which cause protein to fold up and form challenge.
They transport molecules and ions across membranes
Structure of structural proteins.
Consist of long polypeptide chains lying parallel to each other with cross links between them.
Example of structural proteins.
Keratin. - hair / nails
Collagen - connective tissue
Structure of collagen
3 polypeptide chains tightly coiled together making it strong.
Good supportive tissue
What are proteins used as in the body ?
Chemicals messengers
