The fluid mosaic model of membrane structure suggests that membranes are composed of a single fluid layer of phospholipids and proteins
are composed of a fluid bilayer of fatty acids with proteins associated on the outer and inner surfaces
are composed of protein molecules embedded in a fluid bilayer of phospholipids
are composed of a fluid phospholipid bilayer sandwiched between two layers of hydrophilic proteins

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

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