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The cystoplasmic membrane and the cell wall are made of very different substances, and this affects their permeability to certain substances.
The cell wall is made of cellulose (plants) or murein (a peptidoglycon in bacteria/prokaryotic cells). These are carbohydrates.
The cytoplasmic membrane is made of 2 layers of phospholipids. It has many protein channels (tunnels of protein which can allow through certain chemicals needed by the cell, eg. Na+ sodium), or proteins which carry out active transport.
Therefore, the different compositions of the two give rise to their different properties.
What else can I help you with?
Does the cell membrane have tiny holes that allow materials to pass into and out of the cell?
The cell membrane contains protein channels and transporters that regulate the movement of materials in and out of the cell. These channels and transporters control the passage of specific substances into and out of the cell. The cell membrane itself does not have "tiny holes" but rather selective protein structures that facilitate the transport of molecules.
What cell is cytoplasmic DNA a feature of?
Cytoplasmic DNA is a feature of prokaryotic cells, such as bacteria. In these cells, the DNA is located in the cytoplasm rather than within a defined nucleus as seen in eukaryotic cells.
Which of the following factors does not affect membrane permeability?
The presence of membrane proteins does not directly affect membrane permeability. Membrane proteins mainly play a role in transport, signaling, and cell recognition rather than impacting the permeability of the membrane itself.
What type of molecule makes up the bi-layer of a cell membrane?
This membrane is called the fluid mosaic model as it is a mixture of phospholipids, cholesterol, proteins and carbohydrates. Most of the membrane is composed of phospholipid molecules. These allow the membrane to be rather fluid.Embedded in this membrane are proteins which give some structure to the membrane. The 3rd components are proteins or glycolipids. Cholesterol is also found in the membrane. It prevents lower temperatures from inhibiting the fluidity of the membrane and prevents higher temperatures from increasing fluidity.
Movement of water rather than a solute through a cell membrane is called?
The movement of water rather than a solute through a cell membrane is called osmosis. Osmosis is the process by which water molecules move across a semi-permeable membrane from an area of higher water concentration to an area of lower water concentration.
What does a plant cell membrane feel like?
A plant cell membrane is a thin, flexible barrier that feels smooth and somewhat rubbery to the touch. It is not rigid like a cell wall, but rather pliable and delicate.
What is the meaning of selecting permeable?
Selective permeability refers to the function of plasma membranes that is needed to maintain homeostasis in a cell and prevent foriegn substances from entering through the cells walls. Some molecules can pass, some are blocked
Does the cell membrane have tiny holes that allow materials to pass into and out of the cell?
The cell membrane contains protein channels and transporters that regulate the movement of materials in and out of the cell. These channels and transporters control the passage of specific substances into and out of the cell. The cell membrane itself does not have "tiny holes" but rather selective protein structures that facilitate the transport of molecules.
What cell is cytoplasmic DNA a feature of?
Cytoplasmic DNA is a feature of prokaryotic cells, such as bacteria. In these cells, the DNA is located in the cytoplasm rather than within a defined nucleus as seen in eukaryotic cells.
What are the release dates for Dan Rather Reports - 2006 Great Barrier Grief?
Dan Rather Reports - 2006 Great Barrier Grief was released on: USA: 11 June 2013
Is the structure of the plasma membrane sealed tight?
The plasma membrane is not sealed tight; rather, it is a selectively permeable barrier composed of a lipid bilayer with embedded proteins. This structure allows certain molecules to pass through while preventing others, facilitating communication and transport. While some regions may be more tightly packed, the overall membrane is fluid and dynamic, enabling flexibility and the movement of substances.
Where is the rough endoplasmic recticulum in the cell?
The RER is a rather large organelle and it is next to the nuclear membrane and the cellular membrane.
If a tiny hole is made in a plasma membrane it usually heals immediately and no harm results What property of the plasma membrane allows this?
The property that allows the plasma membrane to heal immediately after a tiny hole is its self-sealing nature due to its fluidity and flexibility. The lipid bilayer structure of the plasma membrane can rapidly rearrange to close small breaches, maintaining the barrier function of the membrane.
Are orbeez selectively permeable?
Orbeez, which are superabsorbent polymer beads, are not selectively permeable. They absorb water and expand due to their hydrophilic properties, allowing water to enter but not allowing larger molecules or particles to pass through. This characteristic is due to their structure, which is designed to swell in the presence of water rather than function as a selective barrier.
How does selective logging protect topsoil?
Gold is less valuable than Topsoil. Yet Gold is now valued more than Topsoil, and Forests. I'd rather ask "How does selective logging protect Forests?"
Which of the following factors does not affect membrane permeability?
The presence of membrane proteins does not directly affect membrane permeability. Membrane proteins mainly play a role in transport, signaling, and cell recognition rather than impacting the permeability of the membrane itself.
What is the benefit of harvesting trees by selective cutting rather than clear cutting?
Selective cutting leaves a canopy over the ground keeping it and streams that cross it cooler while also reducing runoff volume and erosion.
