Singapore GCE A-Level H1 Biology Practice Questions - Singapore GCE A-Level H1 Biology Examination (SEAB Syllabus 8876) Exam

Access More Questions

According to the Fluid Mosaic Model, how does cholesterol maintain plasma membrane integrity across fluctuating temperatures in mammalian cells?

It prevents hydrophobic tail crystallization at low temperatures and restricts excessive phospholipid mobility at high temperatures. It forms covalent bonds with phospholipid heads to permanently immobilize the lipid bilayer. It acts as a hydrophilic channel facilitating rapid passive water movement during thermal stress. It hydrolyzes ATP to pump excess lipids out of the membrane during temperature drops.

Correct Answer:

It prevents hydrophobic tail crystallization at low temperatures and restricts excessive phospholipid mobility at high temperatures.

Access more questions from this quiz

Continue to Singapore GCE A-Level H1 Biology Practice Questions - Singapore GCE A-Level H1 Biology Examination (SEAB Syllabus 8876) Exam for more practice questions and the full quiz experience.

Access More Questions