Quiz on Protein Structure

Three dimensional arrangement of a protein

• Conformation

• Denaturation

• Hydrolysis

• Oxidation

Re-folding of a protein often by cooling

• Renaturation

• Denaturation

• Hydrolysis

• Oxidation

Specific region of a protein where secondary structure changes to another and a single function can occur...

• Domain

• Helix

• Sheet

• Loop

Twisted protein structure stabilized by hydrogen bonds

• Alpha helix

• Beta sheet

• Gamma turn

• Delta loop

Half of all proteins include units which join helices and sheets and are called...

• Loops and bends

• Random coil

• Tertiary structures

Level of structure where separate protein “sub-units” come together in multi-mers...

(a)  

Bond angle between the alpha carbon and the amino nitrogen is known as ______.

• Phi

• Psi

• Omega

• Theta

Scientist who charted the main favorable angles in amino acids and related those to folding?

• Linus Pauling

• G. N. Ramachandran

• Francis Crick

• Rosalind Franklin

This simplest of amino acids has the most combinations of phi / psi angles.

• Glycine

• Alanine

• Valine

• Leucine

This amino acid has a ridged phi bond due to its cyclic structure...

• Proline

• Glycine

• Alanine

• Valine