Amino Acids Quiz

What is the role of the alpha carbon in an amino acid?

• Connects the amino group and carboxylic acid group

• Provides energy

• Acts as a catalyst

• Forms hydrogen bonds

Essential amino acids must be obtained from:

• The body

• Food

• Water

• Sunlight

What is the main structural difference between a dipeptide and a single amino acid?

• Presence of a peptide bond

• Presence of a hydroxyl group

• Presence of a phosphate group

• Presence of a sulfhydryl group

What happens to the amine group during the formation of a peptide bond?

• It forms a hydrogen bond

• It releases a hydroxyl group

• It bonds with the carboxyl group

• It forms a disulfide bond

What happens to proteins when the pH is outside their optimal range?

• They become more active.

• They lose their 3D structure.

• They change color.

• They become more soluble.

What determines the primary structure of a protein?

• Gene sequence

• Protein folding

• Peptide bonds

• Hydrogen bonds

What is the primary interaction that stabilizes the α-helix structure?

• Disulfide bonds

• Hydrogen bonds

• Ionic bonds

• Van der Waals forces

Which type of bond is primarily responsible for the tertiary structure of proteins?

• Hydrogen bonds

• Disulfide bonds

• Ionic bonds

• Peptide bonds

What is the effect of denaturation on a protein?

• It increases the protein's solubility

• It alters the protein's primary structure

• It disrupts the protein's secondary and tertiary structures

• It enhances the protein's enzymatic activity

Which component of an amino acid determines its unique characteristics?

• Amino group

• Carboxyl group

• R group (side chain)

• Alpha carbon