Biological Molecules: Proteins: In Depth (Ms.D)

Question 1

Describe the PRIMARY STRUCTURE of a PROTEIN

Answer 1

-SEQUENCE of AMINO ACIDS
-Joined together via PEPTIDE BONDS

Question 2

Describe the SECONDARY STRUCTURE of a PROTEIN

Answer 2

-FOLDING of the SEQUENCE
-Into either α-HELICES or β-PLEATED SHEETS via H-BONDS

Question 3

Describe the TERTIARY STRUCTURE of a PROTEIN

Answer 3

-FOLDING of the SECONDARY STRUCTURE into a 3D STRUCTURE
-Via H-BONDS, IONIC BONDS, DISULPHIDE BONDS and HYDROPHOBIC INTERACTIONS

Question 4

Describe the QUATERNARY STRUCTURE of a PROTEIN

Answer 4

-MULTIPLE POLYPEPTIDE chains LINKED TOGETHER

Question 5

Describe how a PEPTIDE BOND is formed between 2 AMINO ACIDS to form a DIPEPTIDE

Answer 5

-H from AMINE GROUP of 1 of the AMINO ACIDS REACTS with the OH of the CARBOXYL GROUP of another AMINO ACID, forms a WATER MOLECULE (COND. REACTION)
-Leaving the remaining O ATOM from the CARBOXYL GROUP to form a COVALENT BOND