5. Proteins Flashcards
In the amino acid structure what does the amino group consist of?
(-H2N).
In the amino acid structure what does the carboxyl group consist of?
(-COOH).
How are dipeptides formed?
By the condensation of 2 amino acids.
What is the sequence of amino acids in a polypeptide chain called?
The primary structure of protein.
How are polypeptides formed?
By the condensation of many amino acids.
What may a functional protein contain?
One or more polypeptides.
How many amino acids make up all the protein?
20 different ones.
Humans are able to make how many of these amino acids? why not all 20?
12.
Need to get the other 8 from our diet
What are the 2 groups of protein called?
Globular protein.
Fibrous protein.
What are globular proteins?
Usually a molecule which have a chemical function in living organisms and take part in specific reactions.
Examples of globular proteins.
Enzymes.
Hormones.
Blood clotting.
Shape of globular proteins?
Spherical in shape.
Give an example of why globular proteins structure is crucial to its function.
Enzymes have an exact tertiary structure in order to catalyse specific reactions.
Change in shape means they wont work.
How does the globular protein change shape?
High temperatures and pH changes cause the bonds to break in the protein molecule changing the shape.
What are fibrous proteins?
These have a structural role.
