Multiple Choice
Which part of the phospholipid bilayer is hydrophobic and repels water?
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32. Lipids
Intro to Lipids
Multiple Choice
What is the primary functional difference between triglycerides and phospholipids in biological systems?
A
Triglycerides are involved in cell signaling, while phospholipids store energy.
B
Triglycerides are structural components of cell membranes, while phospholipids are used for energy storage.
C
Triglycerides and phospholipids both primarily function as enzymes in metabolic pathways.
D
Triglycerides serve as energy storage molecules, while phospholipids are key components of cell membranes.
Verified step by step guidance1
Understand the structure of triglycerides: Triglycerides are composed of three fatty acid chains attached to a glycerol backbone. This structure makes them efficient for energy storage.
Understand the structure of phospholipids: Phospholipids consist of two fatty acid tails and a phosphate group attached to a glycerol backbone. The phosphate group is hydrophilic, while the fatty acid tails are hydrophobic, making them ideal for forming cell membranes.
Identify the primary function of triglycerides: In biological systems, triglycerides are primarily used for long-term energy storage. They are stored in adipose tissue and can be broken down to release energy when needed.
Identify the primary function of phospholipids: Phospholipids are essential components of cell membranes. Their amphipathic nature allows them to form bilayers, which are crucial for maintaining the integrity and functionality of cells.
Compare the functions: Triglycerides and phospholipids have distinct roles in biological systems. Triglycerides are mainly involved in energy storage, while phospholipids are key structural components of cell membranes, facilitating compartmentalization and cell signaling.
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