Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Lipid bilayers are amphipathic. What does this mean?
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- What features in the chemical composition of phospholipids make them ideal components of the cytoplasmic membrane?arrow_forwardLipid bilayers form spontaneously in a process driven by the hydrophobic effect. Explain how the hydrophobic effect drives bilayer formation from individual lipids in an aqueous environment. Describe how the physical properties of the lipid bilayer are determined by the chemical properties of the membrane lipid components. Diagrams are encouraged for both parts of the question.arrow_forwardHow do we know that membrane phospholipids regularly intermingle and move laterally, but rarely flip from one side of the phospholipid bilayer to the other?arrow_forward
- Why are newly synthesized lipids added to the cytosolic side of the bilayer and not the lumen side and how is this problem addressed?arrow_forwardDraw a lipid bilayer containing any or all of the fatty acids in number one with the presence of Cholesterol and membrane proteins. Your lipid bilayer must contain at least 20 lipid units (including Cholesterol).arrow_forwardThere is a long chain of amino acids with long sections that are mostly polar, alternating with long sections that are nonpolar. How would this chain be organized if it were destined to become a transmembrane protein? A cytoplasmic protein?arrow_forward
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