LEAP 2025 Biology Practice Questions - LEAP 2025 Biology Assessment Exam

Hydrophilic heads face inward away from water, while hydrophobic tails face the aqueous environment. Hydrophobic fatty acid tails face inward toward each other, while hydrophilic phosphate heads face the aqueous outer and inner cellular environments. Phospholipids form a single layer with protein channels embedded only on the extracellular surface. Hydrophilic tails and hydrophobic heads form alternating protein-lipid sandwiches across the membrane.