QQuestionBiology
QuestionBiology
Which statement best describes the fluid mosaic model?
A. The fluid mosaic model shows a cell membrane containing genetic material.
B. The fluid mosaic model shows a cell membrane made of only phospholipids.
C. The fluid mosaic model shows a cell membrane that is rigid and not at all permeable.
D. The fluid mosaic model shows a cell membrane with a pattern-like structure and flexibility.
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Answer
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Step 1:I'll solve this problem step by step, focusing on the fluid mosaic model of cell membranes.
Step 2:: Understand the Fluid Mosaic Model
The fluid mosaic model describes the structure and organization of cell membranes. Let's break down its key characteristics: - Proposed by Singer and Nicolson in 1972 - Describes the membrane as a dynamic, flexible structure - Composed of multiple components, not just a single type of molecule
Step 3:: Analyze the Key Components
The fluid mosaic model includes: - Phospholipid bilayer (the "fluid" part) - Embedded proteins (the "mosaic" part) - Ability to move and change configuration
Step 4:: Evaluate the Answer Choices
A. Incorrect - This describes the nucleus, not the cell membrane B. Incorrect - Membranes contain more than just phospholipids C. Incorrect - The membrane is actually flexible, not rigid D. Correct - This accurately describes the fluid mosaic model's key features: - "Pattern-like structure" refers to the mosaic of proteins - "Flexibility" describes the fluid nature of the membrane
Step 5:: Confirm the Reasoning
The fluid mosaic model emphasizes: - Membrane components can move laterally - Proteins are embedded in the phospholipid bilayer - The membrane is dynamic and flexible
Final Answer
The fluid mosaic model shows a cell membrane with a pattern-like structure and flexibility.
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