Protein Remedial 2

What are the four levels of protein structure?

• 1, 2, 3, 4

• Primary, Secondary, Tertiary, Quinary

• Alpha, Beta, Gamma, Delta

• A, B, C, D

What are NOT true of proteins?

• Serve as the main energy storage molecules

• Contain only carbon and hydrogen

• Serve as structural components of animal skin

• Contain carbon, hydrogen, oxygen, nitrogen, and sulfur

What is the primary structure of a protein?

• The specific sequence of amino acids in the polypeptide

• The 3-D structure produced when all the sub-units combine

• 3-dimensional folding arrangement of a primary structure

• The largest and most complicated of all the food substances

What are the two examples of secondary structure of proteins?

• Gamma Helix, Delta Pleated Sheet

• Alpha Helix, Beta Pleated Sheet

• Alpha Sheet, Beta Helix

• Gamma Pleated Sheet, Delta Helix

What are the bonds that maintain the tertiary structure of a protein?

• Peptide bonds, hydrogen bonds, disulfide bridges

• H-bonds, ionic, disulfide bridges

• Ionic bonds, disulfide bridges, hydrophobic interactions

• Hydrogen bonds, covalent bonds, ionic bonds

What is the relative strength of hydrogen bonds?

• Weak, hydrophobic R groups point inwards

• Weak, hydrophobic interactions

• Weak, very common

• Strong, contribute to strength of fibrous proteins

What does quaternary structure of a protein refer to?

• The specific sequence of amino acids in the polypeptide

• The largest and most complicated of all the food substances

• The 3-D structure or conformation produced when all the sub-units combine

• The 3-dimensional folding arrangement of a primary structure

What are the bonds and interactions that can be found in the tertiary structure of a protein?

• Peptide bonds hydrophobic interactions, Van der Waals force

• H-bonds, ionic, disulfide bridges only

• hydrophobic interactions, Van der Waals force

• Hydrogen bonds, covalent bonds, ionic bonds only