Which of the following is not parameter to affect diffusion concentration? 

  1. Gradient of concentration 
  2. Permeability of the membrane separating them 
  3. Temperature, Pressure 
  4. Gas constant 
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The diffusion of any substance across a membrane depends on 

  1. Solubility in proteins 
  2. Solubility in carbohydrates 
  3. Solubility in lipids 
  4. Solubility in glycolipids 
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Substances which are soluble in lipids…….a…...But which have a hydrophilic moiety……..b……

1. a- move slowly

2. a- move similarly as that of others

3. b- move faster

4. a- move faster

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Which of the following is not a feature of Facilitated Diffusion? 

  1. Without expenditure of ATP 
  2. Cannot cause net transport molecule from higher to lower concentration 
  3. Saturation 
  4. Specific 
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Water channels are made up of 

  1. Eight aquaporins 
  2. Eight different types of aquaporins 
  3. Ten aquaporins 
  4. Ten different types of aquaporins 
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Porins are not present in 

  1. The outer membranes of Plastids 
  2. The outer membrane of Mitochondria 
  3. The outer membrane of bacteria 
  4. Inner membrane of Plastids
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 Which of the following is not sensitive to inhibitors? 

  1. Pump 
  2. Diffusion 
  3. Facilitated Diffusion 
  4. Potions 
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Which of the following is correct with respect to Facilitated Diffusion? 

  1. Some channels are always open while others can be controlled 
  2. All channels are always open 
  3. Some channels are closed while others are always open 
  4. No regulation of channels as such. 
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Molecules move in opposite direction across the membrane by the means of a transport protein, such movement is called 

  1. Biport 
  2. Symport 
  3. Antiport 
  4. Uniport 
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Molecules moves across a membrane independent of other molecules, by the means of membrane protein, the process is called 

  1. Biport 
  2. Symport 
  3. Uniport 
  4. Antiport 
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