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Hello students, in this question we have several sub questions which we have to answer.
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First we have to answer the first question is the membrane molecule responsible for the membrane fluidity? the answer is cholesterol.
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Next we have to answer the two ways the membrane adjusts the fluidity in response to the cold stress.
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So first will be the increasing number of unsaturated fatty acids in phospholipids and next will be the modulating the cholesterol content.
00:42
The integral proteins, these are the embedded within the lipid bilayer and peripheral proteins, these are loosely attached to the membrane surface.
00:55
The function of the membrane proteins are transport enzymatic activity, signal transduction, cell -cell recognition, intracellular joining and attachment to the cytoskeleton and extracellular matrix.
01:12
The proteins, if we see the proteins, these are composed of amino acids and glycoproteins, these are proteins with the carbohydrate chain attached.
01:27
Next the currently accepted model for the membrane is fluid mosaic model.
01:34
Next we have to answer the transport is the movement of substances across the membrane without input of the energy.
01:47
Next the requirement of the passive transport occurs in a concentration gradient is the answer.
01:57
Next the facilitated diffusion is the passive transport of substances across the membrane with the help of transport proteins.
02:07
Simple diffusion is the movement of substances across the membrane without the help of the transport proteins.
02:19
Next the channel proteins, they forms pores in the membrane, carrier proteins, they bind to the substances and change the shape of, change the shape to transport across the membrane.
02:33
Aquaporins are the channel porin proteins which allows the movement of wet water across the membrane.
02:45
Next non -polar molecules are the molecules that move across the molecules by simple diffusion.
02:59
Non -polar molecules are the molecules that move across the membrane, they move across the membrane by simple diffusion...