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WHAT set of terms best describes a cell membrane?
A cell membrane is best described by the terms "phospholipid bilayer," "selectively permeable," and "fluid mosaic model." The phospholipid bilayer forms the fundamental structure, allowing certain substances to pass while blocking others, thus making it selectively permeable. The fluid mosaic model illustrates the dynamic nature of the membrane, where various proteins and lipids can move laterally within the layer, contributing to its functionality.
What makes phospholipids the prime structure for making a cell selectively permeable?
The property of phospholipids that makes them ideal for making up the selectively permeable cell membrane is their ability to form a lipid bilayer. A hydrophilic head and a hydrophobic tail play an important role in the cell membrane.
What does a cell membrane have that makes it easier for certain molecules to cross the cell membrane?
Cell membranes have proteins like channel proteins and carrier proteins that facilitate the transport of certain molecules across the membrane. These proteins provide specific pathways for molecules to pass through, making it easier for them to cross the membrane. Additionally, some molecules can cross the membrane through simple diffusion if they are small and non-polar.
Why are membrane proteins are not very soluble in water?
Membrane proteins have hydrophobic regions that interact poorly with water molecules, making them insoluble in water. The hydrophobic amino acid residues in these proteins tend to aggregate together to minimize their contact with water, leading to membrane proteins being more stable and functional in lipid bilayers rather than in aqueous solutions.
What can oxygen diffuse across a cell membrane but protein cannot?
Oxygen can diffuse across a cell membrane because it is a small, nonpolar molecule that can pass through the lipid bilayer easily without the need for transport proteins. In contrast, proteins are larger and typically polar or charged, making it difficult for them to traverse the hydrophobic core of the membrane. As a result, proteins usually require specific transport mechanisms, such as channels or carriers, to cross the membrane.
What roles do membrane proteins play in making the cell making selectively permeable?
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WHAT set of terms best describes a cell membrane?
A cell membrane is best described by the terms "phospholipid bilayer," "selectively permeable," and "fluid mosaic model." The phospholipid bilayer forms the fundamental structure, allowing certain substances to pass while blocking others, thus making it selectively permeable. The fluid mosaic model illustrates the dynamic nature of the membrane, where various proteins and lipids can move laterally within the layer, contributing to its functionality.
Proteins at the inner surface of the plasma membrane attach the membrane to the cells support structure making the cell rigid?
false
What makes phospholipids the prime structure for making a cell selectively permeable?
The property of phospholipids that makes them ideal for making up the selectively permeable cell membrane is their ability to form a lipid bilayer. A hydrophilic head and a hydrophobic tail play an important role in the cell membrane.
Where cell organelle is where proteins are made?
Ribosomes within the cytosol (if they are free) or within the endoplasmic reticulum (if they are membrane bound) are responsible for making proteins.
Which cell organelle where proteins are made?
Ribosomes within the cytosol (if they are free) or within the endoplasmic reticulum (if they are membrane bound) are responsible for making proteins.
Is making protein a function of the cell membrane?
No. It is the ribosomes. The ribosomes take amino acids and convert them into proteins.
Is it true that proteins at the inner surface of the plasma membrane attach the membrane to the cells support structure making the cell rigid?
The primary proteins of cellular structure (such as in microfilaments or intermediate tubules) is myosin and actin, and sometimes collagen, and all of these are proteins in the cell. Because proteins generally connect to similar structures (aka other proteins), and the cellular membrane must SOMEHOW be attached to the primary cell structure, and it is easier to connect to the inner membrane than outer, the answer is yes.
Which can diffuse across a cell membrane without a transport protein carbohydrates lipids or proteins?
Lipids can diffuse across a cell membrane without a transport protein. This is because lipids are generally hydrophobic and can easily pass through the lipid bilayer of the membrane. In contrast, carbohydrates and proteins are typically larger and more polar, making them unable to cross the membrane without assistance from transport proteins.
What does a cell membrane have that makes it easier for certain molecules to cross the cell membrane?
Cell membranes have proteins like channel proteins and carrier proteins that facilitate the transport of certain molecules across the membrane. These proteins provide specific pathways for molecules to pass through, making it easier for them to cross the membrane. Additionally, some molecules can cross the membrane through simple diffusion if they are small and non-polar.
Is it true that proteins at the inner surface of the plasma membrane attach the membrane to the cell's support structure making the cell rigid?
Your question is unclear, but a cell is supported by the cytoskeleton.
Why are membrane proteins are not very soluble in water?
Membrane proteins have hydrophobic regions that interact poorly with water molecules, making them insoluble in water. The hydrophobic amino acid residues in these proteins tend to aggregate together to minimize their contact with water, leading to membrane proteins being more stable and functional in lipid bilayers rather than in aqueous solutions.
