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Attract water
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∙ 10y ago
Molly Faherty Brisco...
Get rid of waste
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What is the membrane of all cells made of?
the membranes of all cells are made of lipids and protein they form a lipo-protien layer which has two ends - hydrophillic and hydrophobic ends. the hydrophillic ends will be facing towards outer and hydrophobic ends face inward. thus the cell membrane is made of two layers of lipo-protien membrane. the hydrophobic ends wants to be away from water molecule hence facing towards inner side, and hydrophillic ends are facing towards outer as they can ineract with water molecule
31.Hydrophobic interactions of the tails of phospholipids can produce?
lipid bilayer ------ Actually, this is not necessarily true. What 'clusters' form is going to depend on not only the concentration of the lipids in solution, but what the composition of the solution is as well. Generally, lipids in a water-solution (or a salt solution, or buffer, or whatever it may be) will first form micelles, ie. lipid monolayers where the tails all face inwards, to prevent their hydrophobic tails from being exposed to the aqueous environment. Depending on the conditions of the solution, they may form liposomes (ie. micelles that have a double layer rather than a monolayer), or sheets of phospholipid bilayers. The ends of the latter option, however, are energetically unfavorable. If your lipids are in an oil solution, then you are going to see the formation of inverse-micelles, where the tails face out towards the lipophilic (hydrophobic) environment, and the hydrophilic head groups are going to face inwards. ------
Is glucose an amphipathic?
I don't think that glucose has both hydrophyllic and hydrophobic ends though it is soluble. Think phospholipid for an amphipathic molecule.
The cell membrane is made up of phospholipids which are molecules?
The cell membrane is made of a phospholipid bilayer with the hydrophilic ends out and the hydrophobic ends in. There are globular proteins in between the bilayer that assist in transport.
What can you conclude about the advantage of the cell membrane having hydrophobic ends in the phospholipid bilayer?
Well it prevents polar molecules from passing through freely, giving the membrane its semi-permeable properties.
What is the membrane of all cells made of?
the membranes of all cells are made of lipids and protein they form a lipo-protien layer which has two ends - hydrophillic and hydrophobic ends. the hydrophillic ends will be facing towards outer and hydrophobic ends face inward. thus the cell membrane is made of two layers of lipo-protien membrane. the hydrophobic ends wants to be away from water molecule hence facing towards inner side, and hydrophillic ends are facing towards outer as they can ineract with water molecule
In the cell membrane what does the fatty acids of phospholipid molecules do?
The lipid part of the cell phospholipid bilayer is hydrophobic and is responsible for repelling water. The hydrophobic ends face inward towards each other while the hydrophilic ends face outwards, which are saturated with water.
Are both ends of a fatty acid polar?
no, because on end is hydrophobic while the other is hydrophillic
Are unsaturated tails of lips hydrophilic?
Unsaturation occurs in the middle of lipids. The tail ends are always saturated and as such hydrophobic - much better known as non-polar or non-charged, which is why they do not 'like' water.
What is a phosholipd bilayer?
A phospholipid bilayer is a two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward. Also called lipid bilayer.http://dictionary.infoplease.com/phospholipid-bilayer
31.Hydrophobic interactions of the tails of phospholipids can produce?
lipid bilayer ------ Actually, this is not necessarily true. What 'clusters' form is going to depend on not only the concentration of the lipids in solution, but what the composition of the solution is as well. Generally, lipids in a water-solution (or a salt solution, or buffer, or whatever it may be) will first form micelles, ie. lipid monolayers where the tails all face inwards, to prevent their hydrophobic tails from being exposed to the aqueous environment. Depending on the conditions of the solution, they may form liposomes (ie. micelles that have a double layer rather than a monolayer), or sheets of phospholipid bilayers. The ends of the latter option, however, are energetically unfavorable. If your lipids are in an oil solution, then you are going to see the formation of inverse-micelles, where the tails face out towards the lipophilic (hydrophobic) environment, and the hydrophilic head groups are going to face inwards. ------
What is a Phsospholipid?
Phospholipids belong to a group of lipids called amphipathic lipids. The two ends of a phospholipid differ both physically and chemically. One end of each molecule is hydrophilic and is composed of glycerol, phosphate. The other end is the fatty acid portion of the molecule and is hydrophobic and not soluble in water. The amphipathic properties of phospholipids allow them to form lipid bilayers in aqueous solution and are the fundamental components of cell membranes.
The plasma membrane contains two kinds of lipids?
Phospholipids. They feature a phosphate group at one end of each molecule. The heads, or phosphate ends, are hydophilic ("water-loving") and the tails are hydrophobic ("water-fearing"), which keeps them oriented correctly, with the tail ends always inside the lipid layer.
Are polar molecules hydrophillic?
No, non-polar molecules are hydrophobic because they cannot form hydrogen bonds. A good example of this would be a cell membrane. The fatty acids in the lipid bilayer are non-polar and hydrophobic, while the polar ends that face the outside and inside of the cell are hydrophilic.
What are components for each of the four nucleotides of DNA?
The structural ends of nucleotides contain the ribose sugar that interlaces with phosphate groups to form the ribo-phosphate backbone of Dna. The other, nucleic, ends are hydrophobic, face inward, and BASE PAIRING between A and T is achieved using two hydrogen bonds, while Base Pairing between C and G is achieved using three hydrogen bonds.
What is the answer to this in a liquid mixture with water and corn syrup?
A barrier-type wall is formed in between the two. This is because one of the ends of the oil cell is hydrophobic, thus preventing it from mixing with the water.
Because net inward pressure in venular capillary ends is less than net outward pressure of the arteriolar ends of capillaries?
The net inward pressure in venular capillary ends is less than the net outward pressure in arteriolar ends of capillaries because of two main factors: the hydrostatic pressure and the osmotic pressure. In venular capillary ends, the hydrostatic pressure is reduced due to the resistance of the venous system, while the osmotic pressure remains constant. In arteriolar ends, the hydrostatic pressure is higher due to the force exerted by the heart and the osmotic pressure remains the same. As a result, more fluid is filtered out of the capillaries at the arteriolar ends than is reabsorbed at the venular ends.
