1.6 and 1.7 Video

Which part of an amino acid determines its unique chemical properties and distinguishes it from other amino acids?

• Central carbon

• Amine group

• Carboxyl group

• Variable R group

What type of interactions primarily stabilize the tertiary structure of a protein?

• Peptide bonds between amino acids

• Hydrogen bonds within the polypeptide backbone

• Interactions between amino acid side chains (R-groups)

• Interactions between multiple folded polypeptide chains

What is the primary molecular cause of sickle cell disease?

• A mutation leading to the substitution of glutamic acid with valine in hemoglobin.

• A mutation causing red blood cells to produce excess oxygen.

• A genetic disorder that prevents the formation of hemoglobin.

• An infection that causes red blood cells to become rigid.

What is the primary role of DNA in most living organisms?

• To act as an enzyme, catalyzing biochemical reactions.

• To transfer energy for cellular work.

• To serve as the molecule of heredity, passing genetic information.

• To form the structural components of cell membranes.