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2.4 Proteins
IB Syllabus
9
Biology
11th Grade
05/14/2015

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Term
How are polypeptides built?
Definition
from amino acid monomers during condensation reactions.
Term
When does a primary protein become a secondary protein?
Definition
When a basic chain of amino acids in a polypeptide folds and becomes a 3D structure
Term
When does a secondary protein become a tertiary protein?
Definition
Ionic bonds and disulfide bridges
Term
What is the quaternary structure of a protein?
Definition
two or more linked polypeptides.
Term
How many different kinds of proteins are there?
Definition
20
Term
What is the difference between a fibrous and globular protein?
Definition
Fibrous are long, straight fibre-like. Globular are roundish, tangled, circular-ish.
Term
what is the protein Immunoglobulin
Definition
A large protein (antibody) produced by the immune system to fight infection
Term
What is the protein collagen
Definition
A structural protein which builds muscle, tendons, ligaments and the skin of vertebrates
Term
Define denaturation
Definition
the destruction of the complex structure of a protein (secondary, tertiary, quaternary proteins) like what happens when an fried egg is made because the proteins denaturate making the egg white white and solid-ish.
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