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Explain the role of membrane carbohydrates in cell-cell recognition?
membrane carbohydrates are used for the selection of cells to make tissues, and the rejection of foreign cells (like in your blood). Cells recognize each other by binding to surface molecules, often carbohydrates, on the plasma membrane. Membrane carbohydrates may be covalently bonded to lipids of more commonly proteins (forming glycoproteins). Carbohydrates on the external side of the plasma membrane vary among species, individuals, and even cell types in an individual
What are the three components of a cell membrane?
Lipids, proteins, and carbohydrates. Proteins are integral and transmembrane. The transmembrane protein span the entire membrane outside to inside and often act as transport proteins. The integral proteins do not span both ends of the membrane. The lipids (obviously) make up the lipid bilayer. The carbohydrates are short chains that attach to the other two organic molecules, when they attach to a protein they are known as 'glycoproteins' and when they are attached to lipids they are called 'glycolipids'. These carbohydrates play a key role in cell to cell recognition.In other words, Lipids, Proteins, and Carbohydrates make up the cell..
Where do lipids appear primarily in a cell?
Lipids are created in the smooth endoplasmic reticulum of a cell. Many are used in the cell membrane, particularly phospholipids, whose double layer creates the basic structure of the membrane.
How are lipids used in plants?
Plants need lipids/fats to help make up the double layer of the cell membrane.
What is the function of the carbohydrates that make up part of the plasma membrane?
Carbohydrates often attach to the external surface of integral proteins. These carbohydrates may hold adjoining cells together or act as sites where viruses or chemical messengers such as hormones can attach.
What is the group of organic compounds used to form parts of a cell?
Carbohydrates, Proteins and Lipids are groups of organic compounds used to form parts of a cell.
What digest and recycles the cell's used components by breaking down proteins nucleic acids lipids and carbohydrates?
lysosomes
What are the statements of lipids a. lipids are used to store energy b. lipids do not dissolve in water c. lipids mke up part of the cell membrane d. all of the above?
d. All of the above
What are the functions of carbohydrates on the surface of the phospholipid bilayer of the cell membrane?
they are signaling devices that are used to identify what is near the cell
Which two bio-substances -that are also sometimes used for nutrition- make up the cell membrane?
Lipids and proteins.
What is used for building cell parts?
Depending on the part of the cell various combinations of: lipids, proteins, carbohydrates, nucleic acids, glycerine, salts/esters, water, etc.
What do lysosomes do?
Lysosomes are membrane-enclosed strucutres (organelles) in cells that contain digestive enzymes. Damaged components from the cell or food particles engulfed by the cell are delivered to the lysosomes, where they are digested into fundamental building components such as carbohydrates, lipids, amino acids, and nucleic acids to be used by the cell. They also help make proteins for the cel.
