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:  Facilitated Diffusion |
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 Which of the following is not sensitive to inhibitors? 

1 .Pump 

2 .Diffusion 

3. Facilitated Diffusion 

4. Potions 

Subtopic:  Diffusion |
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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:  Facilitated Diffusion |
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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:  Diffusion |
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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:  Diffusion |
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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 |
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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 | Facilitated Diffusion |
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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 | Facilitated Diffusion |
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Which of the following is not a common characteristic between Active transport and Facilitated Transport? 

1. Use of ATP 

2. Highly selective 

3. Liable to saturate 

4. Under Hormonal Regulation 

Subtopic:  Means of Transport: Active | Means of Transport: Passive |
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 Water 

Which one is wrong for Water. 

1. Provides a medium in which different substances are dissolved 

2. Makes 92% part of watermelon 

3. Makes 30-45% part of most herbaceous plants 

4. Present in dry seeds as well 

 

Subtopic:  Plant Water Relations: Water Potential: DPD |
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