객관식
Which of the following correctly identifies the main components of a phospholipid molecule?
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6. The Membrane
Biological Membranes
객관식
Which of the following statements about the role of phospholipids in the structure and function of biological membranes is correct?
A
Phospholipids are completely unable to interact with water.
B
Phospholipids form a single sheet in water.
C
Phospholipids form a structure in which the hydrophobic portion faces outward.
D
They are triacylglycerols, which are commonly available in foods.
E
Phospholipids form a selectively permeable structure.
검증된 단계별 안내1
Understand the structure of phospholipids: Phospholipids are composed of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'. This amphipathic nature is crucial for their role in biological membranes.
Recognize the arrangement of phospholipids in membranes: In an aqueous environment, phospholipids arrange themselves into a bilayer, with the hydrophilic heads facing the water on each side and the hydrophobic tails facing inward, away from the water.
Identify the function of the phospholipid bilayer: This bilayer forms the basic structure of cell membranes, creating a selectively permeable barrier that regulates the entry and exit of substances.
Evaluate the incorrect statements: Phospholipids can interact with water due to their hydrophilic heads, they do not form a single sheet but a bilayer, and they are not triacylglycerols, which are a different type of lipid.
Conclude with the correct statement: The correct statement is that phospholipids form a selectively permeable structure, which is essential for maintaining the internal environment of the cell.
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