OBJECTIVES & FILL IN THE BLANKS OF CELL: Plasma membran & Cytoplasm

Multiple Choice Questions (MCQs)

1. Amount of protein in cell membrane is:

(a) 10%            (b) 30%            (c) 60%           (d) 20%

2. Amount of lipids in cell membrane is:

(a) 10%            (b) 30%            (c) 60%           (d) 20%

3. Which of the following is present in plasma membrane:

(a) Cholesterol (b) Lipids             (c) Protein        (d) all

4. Phospholipids bilayer was described by:

(a) Overton        (b) Grendel        (c) Davson        (d) Singer

5. Fluid mosaic model was given by:

(a) Overton        (b) Grendel        (c) Davson        (d) Singer

6. Sandwich model was given by:

(a) Singer          (b) Grendel        (c) Davson        (d) Overton

7. The diffusion of water across a selectively permeable membrane from an area of higher concentration to an area of lower is:

(a) Endocytosis (b) Exocytosis (c) Osmosis          (d) Diffusion

8. The removal of cell secretions from the cells by out folding is:(a) Endocytosis (b) Exocytosis (c) Osmbsis           (d) Diffusion
   9. The bulk movement of material into the cell by formation of vesicle is:

   (a) Endocytosis (b) Exocytosis (c) Osmosis           (d) Diffusion

   1. The soluble part of the cytoplasm is called:

   (a) Cytosole          (c) Cytoplasm (d) Cytoskeleton (d) Colloidal
   Answers:

   1. (c)   2. (d) 3. (d) 4. (b) 5. (d) 6. (c)          7. (c)  8. (b)

   9. (a)      10. (a)

   Fill in blanks

   
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   1. _______ and Garth Nicholson developed the fluid-mosaic
      model of membrane structure in 1972.
   2. The movement of molecules from the area of higher concentration to the area of lower concentration is called simple __________.
   3. The movement of molecules through the protein molecules fromhigher to lower concentration is called_________ diffusion.
   4. The diffusion of water across a selectively permeable membrane from an area of higher concentration to an area of lower

      concentration is called _________

   5. The relative concentration of solutes in the water inside and outside the cell is called__________.
   6. The nonspecific uptake of all droplets of extracellular fluid is

      called ___________

   7. The uptake of solid particles by invagination is called______.
   8. The soluble part of the cytoplasm is called __________
   9. Non-viscous colloidal solution is called _______
   10. The viscous colloidal solution is called _______
   11. Ans:

       1. S. Singer      2. diffusion      3. facilitated4. osmosis

       5. tonicity        6. pinocytosis 7. phagocytosis8. cytosol

       9. sol               10. gel

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