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Which cell organelle synthesizes the lipids that make up the bulk of cell membranes?
The cell membrane is a lipid bilayer, composed of phopholipids: A glyerol molecule with two fatty-acid groups at one end and a phosphate group at the other.Phospholipids are synthesised in the cytoplasm next to the endoplasmic reticulum. The ER sythesthies the lipids, and contains enzymes that catalyse the production of phopholipids such as Glycerol-3-phosphate acyltransferase. The phospholipids produced migrate naturally to the internal face of the membrane, and flippase moves them to the outer face.
What organization is described as being a fluid mosaic model?
The phospholipid bilayer, also known as the cell membrane.
What is a metaphor for cell membrane?
Many textbooks will compare a cell membrane to the fluid mosaic model, which means that the parts of the membrane (phospholipids, cholesterol, proteins etc.) are not stuck in one place; they move around and can pass by one another while still keeping the integrity of the membrane. That is mainly for the structure, but structure always lends to function.
What Controls what moves in and out of the cell?
Cell membrane
What is a plasma membrane?
A plasm membrane is a permeable memrane located within the cell wall. It serves many functions for the cell, including energy generation and transport of chemicals.
2 layers of these form much of the cell membrane?
A double layer, known as a bilayer, of phopholipids forms the main part of the cell membrane.
What forms an envelope around the cell described as and selectively permeable?
The plasma membrane (cell membrane).
How is the cell membrane of Achaea different?
They phopholipids have an ester link between glycerol and the fatty acid chain instead of the prokaryotic ether link. This makes it less fluid at extreme temps.
Which part of a cell controls which substances can enter?
The cell membrane. It is described as semipermeable
Do red blood cells have a cell membrane?
Yes, red blood cells (erythrocytes) have a cell membrane, but they don't contain a nucleus- thus they're described as enucleate.
What cell part is used to describe the outer edge of a frog blood cell?
Cell membrane
Which cell organelle synthesizes the lipids that make up the bulk of cell membranes?
The cell membrane is a lipid bilayer, composed of phopholipids: A glyerol molecule with two fatty-acid groups at one end and a phosphate group at the other.Phospholipids are synthesised in the cytoplasm next to the endoplasmic reticulum. The ER sythesthies the lipids, and contains enzymes that catalyse the production of phopholipids such as Glycerol-3-phosphate acyltransferase. The phospholipids produced migrate naturally to the internal face of the membrane, and flippase moves them to the outer face.
What type of lipid molecules do membranes consist of?
Phopholipids - They have a hydrophillic head that is positioned to the inside of the cell and the outside environment. They also have hydrophobic tails that point towards each other inside the membrane. This is why cell membranes are referred to as lipid bilayers. They are 2 layers of phospholipids organzied by their interaction with water.
Why is the cell membrane described as being a selective barrier?
The cell membrane is described as being a selective barrier because it controls the movement of substances in and out of the cell. It allows some molecules to pass through while blocking others based on factors like size, charge, and solubility. This selectivity helps maintain the cell's internal environment and regulates cellular processes.
What organization is described as being a fluid mosaic model?
The phospholipid bilayer, also known as the cell membrane.
A typical bacterium cell can be described as?
B: a cell wall surrounding a plasma membrane filled with ctoplasm with circular DNA and inclusions, but no membrane bound organelles.
What is a metaphor for cell membrane?
Many textbooks will compare a cell membrane to the fluid mosaic model, which means that the parts of the membrane (phospholipids, cholesterol, proteins etc.) are not stuck in one place; they move around and can pass by one another while still keeping the integrity of the membrane. That is mainly for the structure, but structure always lends to function.
