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Home Biochemistry Membrane Structure and Functions Comments

  • Question
  • In Fluid mosaic model, the biological membrane can be viewed as


  • Options
  • A. two dimensional solutions of oriented lipids and globular proteins
  • B. three dimensional solutions of oriented lipids and globular proteins
  • C. two dimensional solutions of oriented lipids and carbohydrate
  • D. three dimensional solutions of oriented lipids and carbohydrate

  • Correct Answer
  • two dimensional solutions of oriented lipids and globular proteins 


  • Membrane Structure and Functions problems


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    • 1. Membrane lipids are

    • Options
    • A. hydrophilic
    • B. hydrophobic
    • C. ampiphillic
    • D. none of these
    • Discuss
    • 2. The plasma membrane is a selectively permeable barrier due to presence of specific transport

    • Options
    • A. proteins
    • B. amino acids
    • C. carbohydrates
    • D. none of these
    • Discuss
    • 3. Which of the following is correct?

    • Options
    • A. Peroxisomes have a single boundary membrane
    • B. Peroxisomes contain enzymes that degrade fatty acids and amino acids
    • C. The byproduct of given reactions in (b) is toxic to cells
    • D. All of the above
    • Discuss
    • 4. Which of the following is not found in membranes?

    • Options
    • A. Glycoproteins
    • B. Glycolipids
    • C. Nucleic acids
    • D. Phospholipids
    • Discuss
    • 5. Pinocytosis occurs in

    • Options
    • A. all eukaryotic cells
    • B. all prokaryotic cells
    • C. mitochondria of all cells
    • D. none of these
    • Discuss
    • 6. The smooth endoplasmic reticulum (SER) is the site of

    • Options
    • A. phospholipid synthesis
    • B. amino acid synthesis
    • C. carbohydrate synthesis
    • D. protein synthesis
    • Discuss
    • 7. In membranes, lipids are

    • Options
    • A. glycerophospholipids
    • B. sphingolipids
    • C. sterols
    • D. all of these
    • Discuss
    • 8. The glycosidic bonds in DNA and RNA

    • Options
    • A. connect the sugar to the base
    • B. can be hydrolyzed by OH- ion
    • C. stabilize Watson-Crick H-bonds
    • D. are free to rotate over about 180°
    • Discuss
    • 9. Thymidine

    • Options
    • A. can participate in hydrophobic interactions due to its methyl group
    • B. is replaced by uracil in RNA
    • C. normally forms two hydrogen bonds with adenosine
    • D. all of the above
    • Discuss
    • 10. In gel electrophoresis, what fragments will move most quickly through a gel?

    • Options
    • A. Large fragments
    • B. Small fragments
    • C. Large genome
    • D. None of these
    • Discuss


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