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What effect does the repression of the class 1 MHC membrane proteins have on the cytotoxic t cells?
Wiki User
∙ 13y ago
If the major histocompatability complex is repressed then the antigen's epitope is not displayed on the cell surface and the cytotoxic T cell will not recognize, dock and kill.
Wiki User
∙ 13y ago
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What does fluid mosaic mean in reference to the plasma membrane?
A plasma membrane is described as mosaic because all the different components such as proteins and phospholipids, of varying shape and size, give the effect of the stones of a mosaic. It is described as fluid because these components can move freely within the membrane.
Why is the cell wall referred to as mosaic?
It is referred to as a mosaic because the proteins in the cell membrane float around, creating a mosaic-like effect, because they aren't fixed in place.
How do proteins effect the movement of materials across a cell membrane?
Sometimes particles can pass through a membrane with little trouble such as water. For other, bigger particles, proteins act as a specific receptor for the particles to attach to. If the particle attaches to the receptor properly (imagine a lock and key metaphor) the protein will pull the particle into (or out of) the cell. This is how if you have a headache and take medicine for it, the medicine will target the brain. The drug will flow all through your body skipping over the cells in your legs for example because only the proteins needed are in your head.
What is the effect of heat on beetroot?
The effect of heat on beetroot is that the membrane becomes impacted. It causes the membrane to be more permeable.
What is the effect of glycerol on a cell membrane?
It interact with membrane to increase stiffness
What is the effect of high temperature on purple cabbage membrane?
The cabbage membrane gets darker as the temperature begins to increase. 65 degrees Celsius and above may cause the membrane proteins to be destroyed, hence the color change.
What does fluid mosaic mean in reference to the plasma membrane?
A plasma membrane is described as mosaic because all the different components such as proteins and phospholipids, of varying shape and size, give the effect of the stones of a mosaic. It is described as fluid because these components can move freely within the membrane.
Why is the cell wall referred to as mosaic?
It is referred to as a mosaic because the proteins in the cell membrane float around, creating a mosaic-like effect, because they aren't fixed in place.
How do proteins effect the movement of materials across a cell membrane?
Sometimes particles can pass through a membrane with little trouble such as water. For other, bigger particles, proteins act as a specific receptor for the particles to attach to. If the particle attaches to the receptor properly (imagine a lock and key metaphor) the protein will pull the particle into (or out of) the cell. This is how if you have a headache and take medicine for it, the medicine will target the brain. The drug will flow all through your body skipping over the cells in your legs for example because only the proteins needed are in your head.
What is the effect of heat on beetroot?
The effect of heat on beetroot is that the membrane becomes impacted. It causes the membrane to be more permeable.
What is the effect of glycerol on a cell membrane?
It interact with membrane to increase stiffness
What effect will more cholesterol in the plasma membrane have on the membrane?
It will cause it to become rigid
Effect of temperature on lipids in cell membrane?
the temperature effects the fluidity of the membrane. as the temperature decreases the fluid in the membrane will eventually become solid, this depends on the fatty acid present in the cell. however, a cell can alter the lipid composition of its membrane to some extent as an adjustment to changing temperature as a way of adoption to the colder weather.
Effect of methanol on beet membrane?
Methanol breaks down the structure of the beet membrane which in turn release the pigment, betcyanin, the pigment found in beet cell vacuoles that give beets their characteristic colour, and releases it. The more intense the colour you see, the greater damage that had been done on the membrane.
What effect does a detergent have on the integrity of cells if a lipid is added to the detergent?
A detergent would bring about the deterioration of cell integrity. This is because the cell's membrane consists of lipids and proteins. Most importantly, however, is that the cell membrane is spanned by a phospholipid bilayer and, according to the information given about the effect of detergent on lipids, the cell membrane would be destroyed since it is made up primarily of lipids.
What characteristics make the cell membrane unique?
Cell Membrane is a semi-permeable part of a cell which takes part in exchanging enzymes, proteins or nutrients in between the environment and the cell. The Cell Membrane has a very lively effect to it and acts as a coating which also protects the cell in many ways.
The fact that a cell has an electrical potential difference across its membrane makes that cell what?
The cell membrane is semi-permeable so that charged ions can not diffuse down or up a concentration cell into or out of the cell. There are cell bound proteins that transport charged ions like K+, Na+ and Ca2+ across the cell membrane and the net effect is that the cell is negatively charged ( about -70 mV) with respect to the extracellular space.
