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Home Biochemistry Membrane Structure and Functions Comments

  • Question
  • Lysozymes are found in


  • Options
  • A. plant cells
  • B. animal cells
  • C. microbial cells
  • D. all of these

  • Correct Answer
  • plant cells 


  • Membrane Structure and Functions problems


    Search Results


    • 1. Peptidoglycan is a complex consisting of

    • Options
    • A. oligo-saccharide and protein
    • B. polysaccharide and protein
    • C. mono-saccharide and protein
    • D. aminoacid and carbohydrate
    • Discuss
    • 2. Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?

    • Options
    • A. Cholesterol
    • B. Phospholipid
    • C. Protein
    • D. Carbohydrate
    • Discuss
    • 3. The mesosomes may be the sites of

    • Options
    • A. DNA replication and specialized enzymatic reactions
    • B. RNA replications and specialized enzymatic reactions
    • C. RNA replications and specialized cyclic reactions
    • D. None of the above
    • Discuss
    • 4. Which of the following is correct?

    • Options
    • A. Membranes form boundaries around the cell and distinct subcellular components
    • B. Membranes act as selectively permeable barrier
    • C. Membranes contain varying amount of lipid and protein and some contain small amount of carbohydrates
    • D. All of the above
    • Discuss
    • 5. The movement of molecules across a membrane by passive transport does not require

    • Options
    • A. an input of metabolic energy
    • B. internal energy
    • C. vibrational energy
    • D. none of these
    • Discuss
    • 6. The membrane proteins that catalyze active transport reactions differ from soluble enzymes as

    • Options
    • A. they are permanently changed during the reaction
    • B. the substrates of the reaction are all outside the cell
    • C. they do not enhance the rates of reaction
    • D. the products of the reaction move in a specific direction
    • Discuss
    • 7. The model that is now known to be correct for the structure of biological membrane is

    • Options
    • A. Fluid mosaic model
    • B. Page's model
    • C. Lac Operon model
    • D. Lock and Key model
    • Discuss
    • 8. Cholesterol is essential for normal membrane functions because it

    • Options
    • A. plugs up the cardiac arteries of older men
    • B. cannot be made by higher organisms
    • C. keeps membranes fluid.
    • D. spans the thickness of the bilayer
    • Discuss
    • 9. Bacteriorhodopsin

    • Options
    • A. absorbs light and pumps protons
    • B. is an integral membrane protein
    • C. contains primarily alpha-helical residues
    • D. all of the above
    • Discuss
    • 10. Exocytosis is the secretion of proteins

    • Options
    • A. out of the cell across the plasma membrane into the extracellular space
    • B. out of the cell across the plasma membrane into the intracellular space
    • C. is the uptake of macromolecules from the extracellular space into the cell across the plasma membrane
    • D. is the uptake of macromolecules from the intracellular space into the cell across the plasma membrane
    • Discuss


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