Explain net water movement between solutions separated by a selectively permeable membrane and the role of water channels.
Tę umiejętność sprawdzają 3 zadania wzorowane na arkuszach IB z lat 2023–2026.
A membrane contains aquaporin proteins. What role do they perform? A. They hydrolyse ATP to pump water against its potential gradient B. They attach water covalently to phospholipid tails C. They act only on the external membrane surface D. They provide…
(i) Distinguish the volume changes in the mRNA-treated cells from those in the controls. (ii) Explain how the introduced aquaporins produce this difference.
A researcher maintains living animal cells in an aqueous medium during microscopy. Explain why the medium should have the same osmolarity as the cells.
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