Biologia IBPaper 1A, listopad 2025, TZ1wzorowane1 pktzamkniętełatwe (szac.)
Which substance–route pairing correctly describes movement through a cell membrane? A. Testosterone — directly through the lipid bilayer B. Starch — through an aquaporin C. A sodium ion — freely through the hydrophobic core D. A large antibody — through a…
Biologia IBPaper 1, maj 2024, TZ2wzorowane1 pktzamkniętełatwe (szac.)
Glucose moves into a cell down its concentration gradient through a glucose carrier. Why is a membrane protein needed? A. Every downhill movement requires ATP hydrolysis B. Glucose is too non-polar to enter a lipid layer C. The carrier reverses the glucose…