Test Review for AP Biology Chapter 5 What molecules make up the
... 3. Know how temperature effects the cell membrane. Ie. What is one of the ways that a membrane of winter vegetation can remain fluid when cold? 4. For a protein to be an integral membrane protein would it need to be hydrophilic, hydrophobic or amphipathic? 5. Why do unsaturated fatty acids help keep ...
... 3. Know how temperature effects the cell membrane. Ie. What is one of the ways that a membrane of winter vegetation can remain fluid when cold? 4. For a protein to be an integral membrane protein would it need to be hydrophilic, hydrophobic or amphipathic? 5. Why do unsaturated fatty acids help keep ...
Chapter 5
... – Nonpolar molecules will move until the concentration is equal on both sides – Limited permeability to small polar molecules – Very limited permeability to larger polar molecules and ions ...
... – Nonpolar molecules will move until the concentration is equal on both sides – Limited permeability to small polar molecules – Very limited permeability to larger polar molecules and ions ...
A-PC3267 Lect 9 2007 - NUS Physics Department
... big difference between e-ε/kT (single chain) and e-2ε/kT (double chain). -The CMC for phospholipid formation is tiny. Membranes resist dissolving even in environments with extremely low phospholipid concentration. ...
... big difference between e-ε/kT (single chain) and e-2ε/kT (double chain). -The CMC for phospholipid formation is tiny. Membranes resist dissolving even in environments with extremely low phospholipid concentration. ...
Section Slides
... You discover a new phospholipid in a rare cell type. To learn whether it is freely mobile you decide to use a fluorescent tag to label the phospholipids on the membrane surface of these cells. When you examine the membrane using a microscope, you find that the tag is distributed diffusely across the ...
... You discover a new phospholipid in a rare cell type. To learn whether it is freely mobile you decide to use a fluorescent tag to label the phospholipids on the membrane surface of these cells. When you examine the membrane using a microscope, you find that the tag is distributed diffusely across the ...
Imaging Membrane Lipid Domains by Scanning Transmission X
... membranes are patchy, with lipid regions varying in thickness and composition. It is envisioned, that segregated regions rich in saturated lipids and cholesterol float in a sea of unsaturated lipids poor in cholesterol. While both regions are considered to be in the liquid phase, the region high in ...
... membranes are patchy, with lipid regions varying in thickness and composition. It is envisioned, that segregated regions rich in saturated lipids and cholesterol float in a sea of unsaturated lipids poor in cholesterol. While both regions are considered to be in the liquid phase, the region high in ...
Chapt. 7-3 Cell Membrane and Osmosis Cell Membrane
... Cell Membrane- a selectively permeable coating which surrounds the cell protecting and separating it from its surroundings A. Lipid Bilayer- a collection of phospholipids which form a double layered pattern ...
... Cell Membrane- a selectively permeable coating which surrounds the cell protecting and separating it from its surroundings A. Lipid Bilayer- a collection of phospholipids which form a double layered pattern ...
Chapter 5 PowerPoint
... – Nonpolar molecules will move until the concentration is equal on both sides – Limited permeability to small polar molecules – Very limited permeability to larger polar molecules and ions ...
... – Nonpolar molecules will move until the concentration is equal on both sides – Limited permeability to small polar molecules – Very limited permeability to larger polar molecules and ions ...
klathrop/Plasma Membrane unit Vocabulary
... drop of food coloring in pure water, with out siring or shaking the dye will eventually become distributed even throughout the water. Concentration gradient – the difference in concentration of a substance between two parts of a fluid or across a membrane Active transport – the movement of materials ...
... drop of food coloring in pure water, with out siring or shaking the dye will eventually become distributed even throughout the water. Concentration gradient – the difference in concentration of a substance between two parts of a fluid or across a membrane Active transport – the movement of materials ...
Biopharmaceutics
... They knew there's a major barrier and they considers the plasma membrane to be composed of two layers of phospholipid between two surface layers of proteins ( so notice here that protein could be either under the surface or outer the surface ) , with the hydrophilic "head" groups of the phospholipid ...
... They knew there's a major barrier and they considers the plasma membrane to be composed of two layers of phospholipid between two surface layers of proteins ( so notice here that protein could be either under the surface or outer the surface ) , with the hydrophilic "head" groups of the phospholipid ...
H. Bio Cell Membrane
... pores that ions can pass through. Pore is the thickness of the membrane Ion does not have touch the nonpolar interior of the bilayer. ...
... pores that ions can pass through. Pore is the thickness of the membrane Ion does not have touch the nonpolar interior of the bilayer. ...
Biopharma Dr Rana L2
... They knew there's a major barrier and they considers the plasma membrane to be composed of two layers of phospholipid between two surface layers of proteins ( so notice here that protein could be either under the surface or outer the surface ) , with the hydrophilic "head" groups of the phospholipid ...
... They knew there's a major barrier and they considers the plasma membrane to be composed of two layers of phospholipid between two surface layers of proteins ( so notice here that protein could be either under the surface or outer the surface ) , with the hydrophilic "head" groups of the phospholipid ...
Chapter 5
... B. Current data support the fluid mosaic model of membrane structure 1. Davson and Danielli (1935) – phospholipids form a membrane two molecules thick; the lipid ...
... B. Current data support the fluid mosaic model of membrane structure 1. Davson and Danielli (1935) – phospholipids form a membrane two molecules thick; the lipid ...
Unit 1 Cell and Molecular Bioligy
... linked cytoskeleton, give each cell its distinctive shape and are important in ...
... linked cytoskeleton, give each cell its distinctive shape and are important in ...
Do Now - Typepad
... There are other parts to the membrane, including cholesterol, proteins, and carbohydrates ...
... There are other parts to the membrane, including cholesterol, proteins, and carbohydrates ...
Organelles
... the metabolic processes (chemical reactions) occurring on the inside of the cell from the external environment. ...
... the metabolic processes (chemical reactions) occurring on the inside of the cell from the external environment. ...
Passive transport
... -Their nonpolar nature makes them hydrophobic (“water-fearing”). The phosphate group is polar and hydrophilic (“water-loving”). ...
... -Their nonpolar nature makes them hydrophobic (“water-fearing”). The phosphate group is polar and hydrophilic (“water-loving”). ...
The endoplasmic reticulum and the Golgi
... How/where are proteins modified in a cell? SER stores Ca++ and modify proteins. How does a cell use the SER to create differences in the PL content of its bilayers? How does the Golgi Apparatus participate in exocytosis and endocytosis? How does clathrin help mediate receptormediated endocytosis? ...
... How/where are proteins modified in a cell? SER stores Ca++ and modify proteins. How does a cell use the SER to create differences in the PL content of its bilayers? How does the Golgi Apparatus participate in exocytosis and endocytosis? How does clathrin help mediate receptormediated endocytosis? ...
glucocerebrosidease
... • Trace the path for synthesizing the protein glucocerebrosidease. (Start with DNA) • Trace the path for synthesizing the lipid glucocerebroside. (Synthesis of the lipid part starts in the smooth ER) • Explain the digestion of glucocerebroside by glucocerebrosidease. • Note: You will not be expecte ...
... • Trace the path for synthesizing the protein glucocerebrosidease. (Start with DNA) • Trace the path for synthesizing the lipid glucocerebroside. (Synthesis of the lipid part starts in the smooth ER) • Explain the digestion of glucocerebroside by glucocerebrosidease. • Note: You will not be expecte ...
Lipid bilayer
The lipid bilayer is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells. The cell membranes of almost all living organisms and many viruses are made of a lipid bilayer, as are the membranes surrounding the cell nucleus and other sub-cellular structures. The lipid bilayer is the barrier that keeps ions, proteins and other molecules where they are needed and prevents them from diffusing into areas where they should not be. Lipid bilayers are ideally suited to this role because, even though they are only a few nanometers in width, they are impermeable to most water-soluble (hydrophilic) molecules. Bilayers are particularly impermeable to ions, which allows cells to regulate salt concentrations and pH by transporting ions across their membranes using proteins called ion pumps.Biological bilayers are usually composed of amphiphilic phospholipids that have a hydrophilic phosphate head and a hydrophobic tail consisting of two fatty acid chains. Phospholipids with certain head groups can alter the surface chemistry of a bilayer and can, for example, serve as signals as well as ""anchors"" for other molecules in the membranes of cells. Just like the heads, the tails of lipids can also affect membrane properties, for instance by determining the phase of the bilayer. The bilayer can adopt a solid gel phase state at lower temperatures but undergo phase transition to a fluid state at higher temperatures, and the chemical properties of the lipids' tails influence at which temperature this happens. The packing of lipids within the bilayer also affects its mechanical properties, including its resistance to stretching and bending. Many of these properties have been studied with the use of artificial ""model"" bilayers produced in a lab. Vesicles made by model bilayers have also been used clinically to deliver drugs.Biological membranes typically include several types of molecules other than phospholipids. A particularly important example in animal cells is cholesterol, which helps strengthen the bilayer and decrease its permeability. Cholesterol also helps regulate the activity of certain integral membrane proteins. Integral membrane proteins function when incorporated into a lipid bilayer, and they are held tightly to lipid bilayer with the help of an annular lipid shell. Because bilayers define the boundaries of the cell and its compartments, these membrane proteins are involved in many intra- and inter-cellular signaling processes. Certain kinds of membrane proteins are involved in the process of fusing two bilayers together. This fusion allows the joining of two distinct structures as in the fertilization of an egg by sperm or the entry of a virus into a cell. Because lipid bilayers are quite fragile and invisible in a traditional microscope, they are a challenge to study. Experiments on bilayers often require advanced techniques like electron microscopy and atomic force microscopy.