The Ultimate Quiz On Cell Membrane Models

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  • 1/10 Questions

    The diffusion of the water across the concentration gradient is known as what?

    • Exocytosis
    • Osmosis
    • None of the above
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About This Quiz

We welcome you to the ultimate quiz on cell membrane models. The singer-Nicholson and Davson-Danielle models are two of the most influential theories that have been put forward to explain the structure of cell membranes. Do you think you know enough about them? If you feel so, then we highly suggest you take this quiz. We are sure that our quiz will be instrumental in your preparation. There's no time bar on the test, so feel free to take it up as often as you want. Keep learning and have fun! Good Luck!

The Ultimate Quiz On Cell Membrane Models - Quiz

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  • 2. 

    What are the types of carbohydrates that are found in the membrane?

    • Glycoproteins and glycolipids

    • Phospholipids and Lipids

    • Hydrophobic molecules

    • None of the above

    Correct Answer
    A. Glycoproteins and glycolipids
    Explanation
    Glycoproteins and glycolipids are types of carbohydrates that are found in the membrane. Glycoproteins are proteins that have attached carbohydrate chains, while glycolipids are lipids that have attached carbohydrate chains. These carbohydrates play important roles in cell recognition, cell signaling, and cell adhesion. Phospholipids and lipids, although important components of the membrane, do not contain carbohydrates. Hydrophobic molecules are not carbohydrates and are not typically found in the membrane. Therefore, the correct answer is glycoproteins and glycolipids.

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  • 3. 

    Which of the following membrane structures functions in active transport? 

    • Proteins

    • Steroids

    • Integral proteins

    • Glycoproteins

    Correct Answer
    A. Integral proteins
    Explanation
    Integral proteins are membrane proteins that are embedded within the lipid bilayer of the cell membrane. These proteins have hydrophobic regions that interact with the hydrophobic interior of the lipid bilayer, anchoring them in place. Integral proteins play a crucial role in active transport, where they act as transporters or pumps to move molecules or ions against their concentration gradient across the cell membrane. They undergo conformational changes to transport substances across the membrane, requiring energy in the form of ATP. Therefore, integral proteins are the membrane structures that function in active transport.

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  • 4. 

    When was the Davson-Danielle model proposed? 

    • 1920

    • 1935 

    • 1945

    • 1953

    Correct Answer
    A. 1935 
    Explanation
    The Davson-Danielli model was proposed in 1935.

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  • 5. 

    What is the correct sequence of the cell membranes as per Singer and Nicolson's model?

    • P-L-L-P

    • P-P-L-P

    • L-P-P-L

    • L-PL-P

    Correct Answer
    A. P-L-L-P
    Explanation
    According to Singer and Nicolson's model, the correct sequence of the cell membranes is P-L-L-P. This model, known as the fluid mosaic model, suggests that the cell membrane is composed of a phospholipid bilayer with proteins embedded within it. The P-L-L-P sequence represents the arrangement of the phospholipids and proteins in the membrane, with phospholipids forming the outer and inner layers (P) and proteins interspersed within the layers (L). This model provides a dynamic and flexible structure for the cell membrane, allowing it to regulate the movement of substances in and out of the cell.

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  • 6. 

    When was the fluid mosaic model proposed by Signer and Nicolson? 

    • 1956

    • 1960

    • 1988

    • 1972

    Correct Answer
    A. 1972
    Explanation
    The fluid mosaic model proposed by Singer and Nicolson in 1972 describes the structure and organization of the cell membrane. According to this model, the cell membrane is composed of a fluid lipid bilayer in which various proteins are embedded, creating a mosaic-like pattern. This model revolutionized our understanding of the cell membrane, highlighting its dynamic nature and the integral role it plays in cellular functions such as transport, signaling, and recognition.

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  • 7. 

    What is the other name of the Danielli and Davson model? 

    • Fluid mosaic model

    • Lipo-protein sandwich model

    • Lipid bilayer model

    • None of the above

    Correct Answer
    A. Lipo-protein sandwich model
    Explanation
    The other name for the Danielli and Davson model is the Lipo-protein sandwich model. This model proposes that the cell membrane consists of a phospholipid bilayer with protein layers on both sides, forming a sandwich-like structure. The proteins act as a barrier and provide stability to the membrane.

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  • 8. 

    According to the fluid mosaic model, Which type of molecule spans the membrane, from its inner to outer surface?

    • Protein

    • Carbohydrate

    • Phospholipid

    • Nucleic acids

    Correct Answer
    A. Protein
    Explanation
    According to the fluid mosaic model, proteins are the type of molecule that spans the membrane from its inner to outer surface. Proteins are embedded within the phospholipid bilayer of the cell membrane and play a crucial role in various cellular processes such as transport, signaling, and cell adhesion. They have hydrophilic and hydrophobic regions that allow them to interact with both the aqueous environment inside and outside the cell, making them well-suited for spanning the entire membrane.

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  • 9. 

    Which of the following is NOT present in the cellular membrane? 

    • Phospholipids

    • Phospholipids

    • Glycoproteins

    • Glycolipids

    Correct Answer
    A. Phospholipids
    Explanation
    Phospholipids are actually present in the cellular membrane, so they cannot be the correct answer. Phospholipids are a major component of the lipid bilayer that forms the structure of the cellular membrane. They have a hydrophilic (water-loving) head and hydrophobic (water-fearing) tails, which allows them to arrange themselves in a double layer, with the hydrophilic heads facing the water-based environment inside and outside the cell, and the hydrophobic tails facing each other in the middle. This arrangement provides a barrier that controls the movement of molecules in and out of the cell.

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  • 10. 

    Which of the following is NOT an example of lipid found in lipid-linked proteins

    • Stearic acid

    • Palmitic acid

    • Myristic acid

    • Glycosylphosphatidylinositol

    Correct Answer
    A. Stearic acid
    Explanation
    Stearic acid is a type of fatty acid that is commonly found in various foods and oils. However, it is not a type of lipid that is typically found in lipid-linked proteins. Lipid-linked proteins are proteins that are attached to lipids, such as glycosylphosphatidylinositol (GPI), through a covalent bond. Palmitic acid and myristic acid are examples of fatty acids that can be found in lipid-linked proteins. GPI is a type of lipid that is commonly found in lipid-linked proteins and is involved in anchoring proteins to the cell membrane. Therefore, stearic acid is the correct answer as it is the only option that is not an example of a lipid found in lipid-linked proteins.

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Quiz Review Timeline (Updated): Aug 16, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Aug 16, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 18, 2022
    Quiz Created by
    Tanya Mishra
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