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A series of multiple-choice questions and answers covering key concepts related to lipids and membranes in biochemistry. It explores the structure, properties, and functions of various lipid classes, including fatty acids, triacylglycerols, phosphoglycerides, sphingolipids, and cholesterol. The questions delve into the composition and characteristics of biological membranes, including the fluid mosaic model, membrane proteins, and the role of lipids in membrane structure and function. This resource is valuable for students studying biochemistry, biology, or related fields.
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Glycerol contains how many carbon atoms?
PUFA - --polyunsaturated fatty acid
What molecule has four fused rings in its structure?
bonds cause the fatty acids to bend or kink about in solution. This bending reduces the packing structure of fatty acids making them more liquid-like. Where in the body are membranes found? - --In the cell. The cell, itself, and the organelles have membranes. What type of lipid contains a ceramide? What is the purpose of this lipid? - -- Sphingolipids contains a ceramide. The purpose of this lipid is to form the structure of membrane bilayers and in the myelin sheath of neurons. They also aid in defining blood type in individuals. What is the most significant chemical difference between triacylglycerols and phosphoglycerides that lead to their different functions? - --Phosphoglycerides have two fatty acid attached to the glycerol. Triacylglycerols have three fatty acids. Phospoglycerides also have a polar head group attached. What is the fluid mosaic model and what feature of the cells does it help us understand? - --The fluid mosaic model helps us understand biological membranes. It describes the fluid, complex nature of the membrane bilayer. Membranes have lipids and proteins in a rich mixture to help the cell survive.