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Where does synthesis of membrane proteins and secretory proteins happen?
Synthesis of proteins occurs in the Rough Endoplasmic Reticulum.
What component of the membrane causes it to have a fluid consistency?
Phospholipids can move within the bilayer but most of the lipids and proteins drift laterally. Flip flopping doesn't happen very often. When temperatures are cool, the fluid state goes to a solid one. Though it stays fluid at lower temperatures if it has lots of phospholipids with unsaturated hydrocarbon tails.
When mixed with water phospholipids spontaneously form membranes. what properties of phospholipids cause this to happen?
Hydrophilic phosphate groups that are attracted to water and hydrophobic fatty acid tails that avoid water.
What are the advantages of semi permeability in cell membrane?
The membrane acts as a barrier that prevents most things from entering. Small molecules and water can diffuse across the membrane but most proteins and larger molecules cannot. The cell can use this advantage in combination with proteins to decide what gets in, what goes out and when that should happen.
If a cell did not have a supply of amino acids what could happen?
No proteins.
Where does synthesis of membrane proteins and secretory proteins happen?
Synthesis of proteins occurs in the Rough Endoplasmic Reticulum.
What component of the membrane causes it to have a fluid consistency?
Phospholipids can move within the bilayer but most of the lipids and proteins drift laterally. Flip flopping doesn't happen very often. When temperatures are cool, the fluid state goes to a solid one. Though it stays fluid at lower temperatures if it has lots of phospholipids with unsaturated hydrocarbon tails.
What part of the membrane helps chemical reactions happen?
Proteins in the membrane, such as enzymes, play a crucial role in facilitating chemical reactions by providing a suitable environment for the reaction to occur. These proteins can catalyze specific reactions and help transport molecules across the membrane to enable cellular processes.
Which part of the cell membrane helps chemical reactions happen?
The proteins embedded in the cell membrane, such as enzymes and receptors, facilitate chemical reactions by serving as catalysts or by binding to specific molecules to initiate signaling cascades. These proteins play a crucial role in regulating the transport of substances in and out of the cell and in transmitting signals across the membrane.
What happen to a cell during the process of exocytosis?
It reorganizes its cytoskeleton to reposition its secretory vesicles at the plasma membrane. The vesicles then fuse to the plasma membrane using a complex interaction between proteins of the vesicle membrane and proteins of the cell membrane, and a realignment of the lipids of the membranes. This creates a fusion pore, which rapidly expands to expose the vesicle contents to the extracellular milieu. This releases the vesicle contents into the extracellular space.
When mixed with water phospholipids spontaneously form membranes. what properties of phospholipids cause this to happen?
Hydrophilic phosphate groups that are attracted to water and hydrophobic fatty acid tails that avoid water.
What is ATP and what role does it play in energy transfers?
ATP IS energy. It makes reactions happen between chemicals that can't happen on their own, like pumping molecules through the cell membrane or helping put together proteins through transcription and translation.
What are the advantages of semi permeability in cell membrane?
The membrane acts as a barrier that prevents most things from entering. Small molecules and water can diffuse across the membrane but most proteins and larger molecules cannot. The cell can use this advantage in combination with proteins to decide what gets in, what goes out and when that should happen.
What would happen to a resting membrane potential if the concentration of a large intracellular anions that are unable to cross the membrane experimentally is increased?
If the concentration of large intracellular anions..i.e. proteins, which are unable to cross the membrane due to their large size.. were to increase, the resting potential would reach a more negative state, a deviation from -70mV to a more negative value do to these anions.
What will happen if plasma membrane is ruptures?
lysis
What happen to the portion of the cell membrane that surrounds a large molecules during endocytosis?
it separates from the membrane.
What would happen to a cell if its membrane burst?
It would depend on the extent of the damage to the cell membrane. If there is only minor damage to the membrane, the cell will produce the necessary proteins, fats and carbohydrates to repair the damage, and work towards returning to homeostasis. If the damage is extensive, the cell will lyse and die, as it is no longer able to maintain homeostasis.
