Describe how the interaction of water with dual polarity lipid molecules establishes biological
membranes.
What will be an ideal response?
The hydrogen bonding between water molecules forms a lattice that resists invasion by nonpolar
molecules. However, polar molecules can interact with the hydrogen-bond lattice. Lipid molecules
with both polar and nonpolar regions can align in a bilayer, with the lipid molecules oriented so that
their polar regions are on either side of the bilayer and their nonpolar regions are buried in the middle
of the bilayer. In this arrangement only the polar ends are exposed to the water. This creates a
membrane of lipid molecules that separates the watery solution on one side of the bilayer from the
watery solution on the other side of the bilayer.
You might also like to view...
List and briefly explain the three ways in which genetic variability is increased during meiosis
What will be an ideal response?
Which of the following types of plant hormones is apparently synthesized from carotenoid pigments
inside plastids?
a. salicylic acid b. cytokinins c. abscisic acid d. jasmonates e. brassinosteroids
If a researcher is cloning a sequence by using pUC and uses the plasmid to transform bacteria, which are then plated on X-gal medium, would the recombinant plasmids be found in blue or white colonies or both?
What will be an ideal response?
Which nutrient molecule CANNOT be used in the oxidative pathways?
a. fatty acids b. protein c. glucose d. cholesterol