BIOLOGY 1A03 Lecture Notes - Lecture 2: Lipid Bilayer, Atp Hydrolysis, Cellular Respiration

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

Therese properties change the shape, size, behaviour of phospholipids and ultimately the membranes. Remember that uidity is important in maintaining cellular function: unsaturated or saturated fatty acids, number of carbons in the fatty acid tails, temperature, presence or absence of cholesterol. If all the fatty acid tails are straight, there is a lower permeability. When there are kinks in the lipid tails, the heads can"t pack as closely together. A membrane composed mainly of shorter, unsaturated phospholipids. A membrane composed mainly of longer, saturated phospholipids. Fluid mosaic model membranes consists of proteins and carbohydrates embedded in a uid phospholipid bilayer. Ability of cell membranes to control the tra c of substances into and out of the cell and its organelles make them selective permeable. Proteins can be amphipathic; these can integrate into lipid bilayers. Passive di usion areas from high to low concentration along a gradient.