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Sagot :
Answer: D, Double layer of phospholipid
Cell membrane is the phospholipid bilayer. Phospholipids(phosphate+lipids molecules) form the basic structure of cell membrane, known as phospholipid bilayer.The each lipid molecule have the hydrophoic and hydrophillic end. the two lipid layer are attached by their hydophobic ends(tail region) and forms bilayer. The lipid bilayer also contains the integral proteins which are important for transporting substances(sugar molecules, ions) across the cell membrane.(Image)
The cell membrane is made up of double layer of phospholipids having lipids, proteins and carbohydrates (d).
Further Explanation:
In every living organism the cell acts as the basic structural and functional unit of life. Every cell is surrounded by the cell membrane. Cell membrane is important for acting as the boundary between the cell’s internal and external environment. Every molecules that has to pass into or out of the cell has to cross the cell membrane lipid bilayer barrier.
According to Fluid Mosaic Model, cell membrane is made up of two layers of amphipathic lipid.
The lipids found in the cell membrane are generally phospholipids. These lipids have polar head and non-polar tail. The hydrophilic part projects outside and the hydrophobic part points towards each other within the lipid bilayer. There is the presence of extrinsic, intrinsic protein and carbohydrate as well in these lipid bilayers.
Learn more:
1. Learn more about prokaryotic cell : https://brainly.com/question/1579016
2. Learn more about eukaryotic cell: https://brainly.com/question/4493579
3. Learn more about spindle microtubule: https://brainly.com/question/10767798
Answer Details:
Grade: Middle school
Subject: Biology
Chapter: Structure of the cell
Keywords:
Cell, cell membrane, amphipathic molecules, fluid mosaic model ,lipids , bilayer hydrophilic entity, hydrophobic entity, extrinsic protein, intrinsic protein, carbohydrate, polar molecules, non-polar molecules, phospholipid.
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