Biomolecules and Protein Structure Quiz

Which of the following elements is NOT listed as a primary component of biomolecules?

• Carbon

• Hydrogen

• Iron

• Phosphorus

Which of the following is NOT listed as a type of biomolecule in the image?

• Carbohydrates

• Vitamins

• Lipids

• Nucleic Acids

What does Enthalpy (H) represent?

• State of disorder

• Energy available to do chemical work

• Total heat content

• Reaction rate

What does Entropy (S) represent?

• Total heat content

• State of disorder

• Energy available to do chemical work

• Activation energy

What does Free Energy (G) represent?

• Total heat content

• State of disorder

• Energy available to do chemical work

• Reaction equilibrium

What is the sign of ΔG (change in Gibbs free energy) for a spontaneous reaction?

• ΔG > 0

• ΔG = 0

• ΔG < 0

• ΔG is unpredictable

What type of reaction is associated with a negative ΔG and a release of free energy?

• Endergonic

• Endothermic

• Exergonic

• Equilibrium

Which level of protein structure refers to the linear sequence of amino acids?

• Secondary structure

• Tertiary structure

• Quaternary structure

• Primary structure

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

• Disulfide bonds

• Hydrophobic interactions

• Hydrogen bonds between backbone atoms

• Ionic bonds

Which level of protein structure describes the overall three-dimensional shape of a single polypeptide chain?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure