tertiary and quaternary amino acids

the stabilizing interactions in proteins include disulfide bond, hydrogen bond ,_________and ___________

• electrostatic attraction and hydrophilic interaction

• electrostatic attraction and hydrophobic interaction

• ionic interaction and hydrophobic interaction

• ionic interaction and hydrophilic interaction

In tertiary amino acids ,the more energy released, more unstable the protein

• true

• false

Which one of the following is a tertiary structure?

• Myoglobin

• Hemoglobin

• Keratin

• Insulin

Inside-out amino acid distribution is seen in

• proline

• porin

• pepsin

• tryptophan

In this protein structure what does A and B represent

• A- heme group and iron atom

• B - alpha helices

• A - alpha helices

• B - heme group and iron atom

tertiary refers to the spatial arrangement of ______while quaternary refers to the spatial arrangement of _________

• amino acid ,subunit

• subunit, amino acid

• dimer ,amino acid

• amino acid, dimer

The polypeptide chain folds so that its ________side chains are buried and its_______ ,charged chains are on the surface

•       hydrophobic, nonpolar

       

•       hydrophobic ,polar

•   hydrophilic ,nonpolar

• hydrophilic, polar

The interior of tertiary structure consists entirely of polar residues.

• true

• false

Compact globular units on polypeptide chains like pearls on string

• dimer

• domain

• subunit

each polypeptide chain in a protein is called

• dimer

• domain

• subunit