Proteins and Enzymes Flashcards
What is a protein?
A polymer built up of one or more amino acids.
What is an amino acid?
The monomer that make up proteins.
What is a peptide bond?
The bond between amino acids in all proteins.
What are some types of proteins?
Enzymes, antibodies, transport and structural.
What letters represent the amine group in an amino acid?
NH
What letters represent the carboxyl group in an amino acid?
COOH
What letter represents a side chain in an amino acid?
R
What is the only part of the amino acid that changes?
The side (R) group.
How is a dipeptide formed?
Condensation of two amino acids.
How is a polypeptide formed?
Condensation of many amino acids.
What is the name for the test for proteins?
The Biuret test.
How do we conduct the Biuret test for proteins?
1) Add biuret reagent (copper sulphate and sodium hydroxide)
2) if protein is present, colour turns purple.
What is the primary structure of proteins?
The sequence of amino acids.
What bonds are present in the primary structure of proteins?
Peptide bonds.
What is the secondary structure of proteins?
The long chains of amino acids fold into regions with repeating patterns (alpha helix and beta pleated sheet).