Multiple choice

A scientist wishes to synthesise a new drug which will act as an ionophore to deliver Ca2+ across the nerve cell membrane. This drug would most likely be

  1. hydrophobic on the outside and hydrophilic on the inside

  2. insoluble in lipids

  3. soluble in proteins

  4. smaller than 0.001 nm in diameter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ionophores are molecules that transport ions across lipid membranes. To function effectively, they must have a hydrophobic exterior that can dissolve in the lipid bilayer and a hydrophilic interior that can bind and transport ions like Ca2+. This amphipathic structure allows them to shuttle ions across the otherwise impermeable membrane.

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