0
Hydrophilic ends of proteins are oriented toward membrane surfaces. true or false?
Wiki User
∙ 12y ago
false
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Functions of integral membrane protein?
Integral proteins are found within the membrane and have hydrophobic regions embedded within the membrane and hydrophilic regions that project from both surfaces of the bilayer Many integral proteins are glycoproteins, which have an attached carbohydrate chain. As with glycolipids, the carbohydrate chain of sugars projects externally. There- fore it can be said that the plasma membrane is "sugar- coated." The plasma membrane is asymmetrical: the two halves are not identical. The carbohydrate chains of the glyco-lipids and proteins occur only on the outside surface and the cytoskeletal filaments attach to proteins only on the inside surface
What makes amino acids or proteins hydrophilic or hydrophobic?
The composition of all of the particular Amino Acids depends upon the composition of their -R groups - [side chains] which can be: - animo acids with nonpolar -R groups, or uncharged polar -R groups, or charged polar -R groups at pH 6.0 to 7.0, or basic -R groups (positively charged at pH 6.0). Some contain sulfur that have special requirements. Amino acids chain into proteins thusly: -C-C-N-C-C-N- {the peptide bond} the -R group radiating from the -C-N- [or is that the -N-C-] moiety. The simplest hydrophilic -R group is the proton - H+ {Glycine}.
What makes phospholipid molecules uniquely suited to their role in membrane structure?
Phosopholipids have both a hydrophilic (water loving) and hydrophobic (water hating) region. This enables them to effectively make a barrier between the fluid inside and outside of the cell. The heads of phospholipids are hydrophilic - and so form the surfaces of the membrane, with their hydrophobic (lipid) tails facing inwards.
What is a strong fibrous membrane covering a long bone except at joint surfaces?
periosteum
Where can the synovial membrane be found In the immovable joint or slightly movable joint?
The Synovial membrane surrounds movable joints and secretes a fluid "synovial fluid" that acts as a lubricant for the joint surfaces.
Hydrophilic regions of proteins protrude from both surfaces of the bilayer?
False
Functions of integral membrane protein?
Integral proteins are found within the membrane and have hydrophobic regions embedded within the membrane and hydrophilic regions that project from both surfaces of the bilayer Many integral proteins are glycoproteins, which have an attached carbohydrate chain. As with glycolipids, the carbohydrate chain of sugars projects externally. There- fore it can be said that the plasma membrane is "sugar- coated." The plasma membrane is asymmetrical: the two halves are not identical. The carbohydrate chains of the glyco-lipids and proteins occur only on the outside surface and the cytoskeletal filaments attach to proteins only on the inside surface
These form the cell membrane by lining up tail-to-tail in a double row?
The cell membrane is formed from a phospholipid bilayer, with the hydrophobic lipid portions (the tails) on the inner portion and the hydrophilic portion of the phospholipid (the heads) facing the inner and outer surfaces. There are also proteins in the cell membranes.
What are integral and transmembrane proteins?
the proteins that protrude from both surfaces of the bilayer
What is A lipid bi-layer with many proteins embedded in it and attached to its surfaces is called?
plasma membrane of the cell
What makes amino acids or proteins hydrophilic or hydrophobic?
The composition of all of the particular Amino Acids depends upon the composition of their -R groups - [side chains] which can be: - animo acids with nonpolar -R groups, or uncharged polar -R groups, or charged polar -R groups at pH 6.0 to 7.0, or basic -R groups (positively charged at pH 6.0). Some contain sulfur that have special requirements. Amino acids chain into proteins thusly: -C-C-N-C-C-N- {the peptide bond} the -R group radiating from the -C-N- [or is that the -N-C-] moiety. The simplest hydrophilic -R group is the proton - H+ {Glycine}.
What are found in the plasma membrane of cells?
The cell membrane is a phospholipid bilayer with water-soluble “heads” that form surfaces and water-insoluble “tails” that form the interior.In the membrane there are cholesterol molecules that stabilize the membrane so it isn't so flexible and proteins. These act as receptors, pores, channels, carriers and self-markers.
Difference between receptor proteins and carrier proteins?
Receptor proteins are fond in cell membrane surfaces. They are not transport proteins, they conduct the signalling event that cause the cell proliferation, migration and cell death process such as apoptosis. Hormones activates such signalling cascades by binding on the hormone receptors of the cell.
What is the membraned covered structure that contains all materials necessary for life?
if you don't know the answer then don't say anything its very stupid. The answer is plasma membrane is the boundary between the fluids within and outside of a cell. It is composed primarily of phospholipids and proteins. The phospholipids are arranged in 2 layers with their hydrophobic fatty acid tails to the interior of the membrane and their hydrophilic polar heads on the inner and outer surfaces. Some of these molecules have carbohydrate chains attached to them forming glycolipids and glycoproteins. Cholesterol is found in animal plasma membranes. The membrane is a fluid and its components are slowly drifting past one another.
What makes phospholipid molecules uniquely suited to their role in membrane structure?
Phosopholipids have both a hydrophilic (water loving) and hydrophobic (water hating) region. This enables them to effectively make a barrier between the fluid inside and outside of the cell. The heads of phospholipids are hydrophilic - and so form the surfaces of the membrane, with their hydrophobic (lipid) tails facing inwards.
Minimizing friction between opposing surfaces is the primary purpose of which type of membrane?
Mucous membrane.
Infected cells have some of the pathogen's proteins on their surfaces?
true
