Quiz on Proteins and Water Properties

What are proteins composed of?

• Carbohydrates

• Amino acids

• Fatty acids

• Nucleotides

Which of the following is a fibrous protein?

• Hemoglobin

• Myoglobin

• Collagen

• Insulin

What is the characteristic of globular proteins?

• Insoluble in water

• Spherical in shape and water-soluble

• Linear and insoluble

• Present only in connective tissue

What are conjugated proteins composed of?

• Only amino acids

• Amino acids and carbohydrates

• Amino acids and prosthetic groups

• Amino acids and fatty acids

The primary structure of proteins refers to the:

• Three-dimensional folding

• Linear sequence of amino acids

• Arrangement of polypeptides

• Hydrogen bonding within the structure

Which bond stabilizes the alpha-helix structure in proteins?

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Disulfide bridges

Beta-pleated sheets are common in which type of protein?

• Globular proteins

• Fibrous proteins

• Membrane proteins

• Enzymes

What stabilizes the tertiary structure of proteins?

• Hydrogen bonds

• Salt bridges

• Hydrophobic interactions

• All of the above

Hemoglobin is an example of which protein structure?

• Primary

• Secondary

• Tertiary

• Quaternary

What is the chemical formula of water?

• H2O2

• H2O

• HO

• OH2