Practice Questions

Amphipathic molecules contain both hydrophilic and hydrophobic regions, allowing bilayer formation.

One hydroxyl group of glycerol is linked to a phosphate group, while the other two are linked to fatty acids.

Each triglyceride contains three ester linkages joining glycerol to fatty acids.

Triglycerides serve as the principal storage form of energy in adipose tissue.

The oxidizing environment of the endoplasmic reticulum promotes the formation of disulfide bonds in secreted and membrane proteins.

Protein function depends on proper folding into the native three-dimensional structure.

The heme prosthetic group contains Fe²⁺, which reversibly binds oxygen.

β-sheets are classified according to the orientation of adjacent strands.

Histidine's pKa is close to physiological pH, making it ideal for acid-base catalysis.

Chaperones bind exposed hydrophobic regions of unfolded proteins, preventing aggregation and promoting correct folding.