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

Subtopic:  Means of Transport: Passive |
 83%
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 Which of the following is not sensitive to inhibitors? 

  1. Pump 
  2. Diffusion 
  3. Facilitated Diffusion 
  4. Potions 
Subtopic:  Means of Transport: Passive |
 73%
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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. 
Subtopic:  Means of Transport: Passive |
 75%
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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 
Subtopic:  Means of Transport: Passive |
 96%
From NCERT
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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 
Subtopic:  Means of Transport: Passive |
 85%
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Active Transport 

Which of the following is wrong? 

  1. Uses energy to transport 
  2. Uses energy to pump molecules against a concentration gradient 
  3. Carried out by specific membrane proteins 
  4. Substances are transported from a high concentration to low concentration 

 

Subtopic:  Means of Transport: Active |
 90%
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Transport Proteins 

  1. Can perform only passive transport 
  2. Performs passive transport as well as Active transport 
  3. Needed only in active transport 
  4. They may be required for simple diffusion 

 

Subtopic:  Means of Transport: Active | Means of Transport: Passive |
 83%
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Pumps 

  1. Can perform only passive transport 
  2. Performs passive transport as well as Active transport 
  3. Needed only in active transport 
  4. They may be required for simple diffusion 

 

Subtopic:  Means of Transport: Active |
 74%
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Membrane proteins are for 

  1. Uphill transport 
  2. Downhill transport 
  3. Uphill as well as downhill transport only 
  4. For Facilitated Diffusion only 

 

Subtopic:  Means of Transport: Active | Means of Transport: Passive |
 79%
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Transport proteins are 

  1. Specific 
  2. Sensitive to inhibitors 
  3. Show saturation 
  4. All of these 
Subtopic:  Means of Transport: Active | Means of Transport: Passive |
 98%
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