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When phospholipid molecules are placed in water they form bilayer membranes Describe what you think happens to cause the formation of the bilayer membranes?
Wiki User
∙ 13y ago
The hydrophobic and hydrophilic effect. The nonpolar tails join together in the middle of the bilayer away from water and the polar heads that can tolerate water are on the outside of the bilayer.
Wiki User
∙ 13y ago
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Describe how the diffusion of ions across a cell membrane differs from the diffusion of nonpolar molecules across the cell membrane?
Ions need to be facilitated through a cell membrane because they are passing through a phospholipid bilayer with a hydrophobic interior. Non polar molecules are also hydrophobic, so they can pass through the membrane easily if they are small enough. Ions are polar, so they have a hard time passing through membranes.
Describe how phospholipid molecules are oriented in the plasma membrane of a cell?
The plasma membrane and other membranes of a cell are composed mostly of proteins and a type of lipid called phospholipids. A phospholipids molecule is structured with two fatty acids. The two fatty acids at one end (the tail) of the phospholipids are hydrophobic (not attracted to water). The other end (the head) of the molecule includes a phosphate group, which is negatively charged and hydrophilic (attracted to water). Thus, the tail end of a phospholipids is pushed away by water, while the head is attracted to water.
Name and describe the purpose of the 4 extra embryonic membranes?
The extra embryonic membranes are; chrion, amnion, allantois, and yolk sac
What describe speciation?
The formation of a new species
What is the difference in hemopoiesis and erythropoiesis?
Hemopoiesis is the term used to describe the formation of all blood cells. Erythropoiesis is the term used to describe only the formation of red blood cells.
The characteristic that describe the tail of a phospholipid molecule are?
I would describe the characteristics of the tail of a phospholipid molecule would be mosaic of lipid molecules. The process of theses cells are talked and learnt in science.
The characteristics that best describe the tail of a phospholipid molecule are .?
I would describe the characteristics of the tail of a phospholipid molecule would be mosaic of lipid molecules. The process of theses cells are talked and learnt in science.
What is the best way to describe the chemical role of membranes within a cell?
it recognize the foreign and familiar molecules.
He characteristics that best describe the tail of a phospholipid molecule are .?
The most notable characteristic is amphipathicity, meaning it is hydrophilic on one end and hydrophobic on the other. This allows it to form a bilayer, of which cell membranes are made. If a molecule were to cross through the membrane, it would need to diffuse through a hydrophilic region, a hydrophobic region, and another hydrophilic region, which is difficult for most molecules. This is why the phospholipid bilayer is a good way to separate a cell from its environment.
Describe how the diffusion of ions across a cell membrane differs from the diffusion of nonpolar molecules across the cell membrane?
Ions need to be facilitated through a cell membrane because they are passing through a phospholipid bilayer with a hydrophobic interior. Non polar molecules are also hydrophobic, so they can pass through the membrane easily if they are small enough. Ions are polar, so they have a hard time passing through membranes.
Describe how phospholipid molecules are oriented in the plasma membrane of a cell?
The plasma membrane and other membranes of a cell are composed mostly of proteins and a type of lipid called phospholipids. A phospholipids molecule is structured with two fatty acids. The two fatty acids at one end (the tail) of the phospholipids are hydrophobic (not attracted to water). The other end (the head) of the molecule includes a phosphate group, which is negatively charged and hydrophilic (attracted to water). Thus, the tail end of a phospholipids is pushed away by water, while the head is attracted to water.
What is the best way to describe a phospholipid?
a lipid molecule with a polar head and tail.
What best describe the tail of a phospholipid molecule?
Neutral charge, nonpolar, and hydrophobic.
Describe how a solid changes into a liquid and how a liquid changes into gas?
both can be achieved by applying heat and breaking up the formation of the molecules at different levels of applied energy.
Describe the processes that have led to the formation of the soufriere volcanoes?
Describe the processes that have led to the formation of the Soufriere Hills volcano?
Describe in detail the site of blood formation in foetus and adults?
describe in detail the site of blood formation in foetus and adults
Name and describe the purpose of the 4 extra embryonic membranes?
The extra embryonic membranes are; chrion, amnion, allantois, and yolk sac
