Explain why phospholipids arrange their water-attracting and water-repelling regions into bilayers.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2022–2026.
A membrane’s molecular organization underlies selective transport and electrical properties. (a) Outline phospholipid structure and its interactions with water. (b) Explain how proteins enable substances to cross membranes. (c) Describe the establishment of a…
Four molecular structures are shown. Which has distinct water-attracting and water-repelling regions and is therefore amphipathic? A. Molecule D B. Molecule B C. Molecule C D. Molecule A
Draw a simplified phospholipid and label the regions showing amphipathic properties.
Explain why phospholipids form bilayers in water.
Which description fits the labelled regions of the membrane lipid? A. Both regions carry the same exposed negative charge B. X interacts with water; Y is non-polar C. X avoids water; Y is an ionic phosphate group D. X is a hydrocarbon chain; Y is water-soluble
The diagram represents part of a cell membrane. Annotate the diagram to show why phospholipids are amphipathic.
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