336513
Unloading of mineral ions occurs by which means of transport?
1 Pressure flow
2 Active transport
3 Diffusion
4 Both 2 and 3
Explanation:
Unloading of mineral ions occurs at the fine vein endings through diffusion and active uptake by these cells.
BIOXI11: TRANSPORT IN PLANTS
336514
Which of the following is a part of structural component and is not remobilised?
1 Phosphorous
2 Calcium
3 Nitrogen
4 Potassium
Explanation:
Some elements that are structural components like calcium are not remobilised.
BIOXI11: TRANSPORT IN PLANTS
336515
Actively transport of ions in only one direction is due to the presence of which layer in the endodermal cells of the root?
1 Lipid layer
2 Suberin
3 Cellulosic cell wall
4 Plasmodesmata
Explanation:
The root endodermis because of the layer of suberin has the ability to actively transport ions in one direction only.
BIOXI11: TRANSPORT IN PLANTS
336516
Which of the following change is observed due to decrease in concentration of solute in the guard cells?
1 Osmotic pressure increases
2 Water potential increases
3 Water potential decreases
4 More than one option are correct
Explanation:
The guard cells manufacture food by photosynthesis. It synthesizes glucose during the day time and so its water potential decreases and it withdraws water from the epidermal cell and turns turgid and the stomata opens and transpiration takes place. At night, when there is no light the amount of solute decreases in guard cell which leads to increase its water potential. The guard cell loses water and turns flaccid and the stomata closes, so the transpiration stops.
BIOXI11: TRANSPORT IN PLANTS
336517
Statement A : Specific proteins in the membranes of root hair cells actively pump ions from the soil into the cytoplasms of the epidermal cells. Statement B : Like all cells, the endodermal cells have many transport proteins embedded in their plasma membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
336513
Unloading of mineral ions occurs by which means of transport?
1 Pressure flow
2 Active transport
3 Diffusion
4 Both 2 and 3
Explanation:
Unloading of mineral ions occurs at the fine vein endings through diffusion and active uptake by these cells.
BIOXI11: TRANSPORT IN PLANTS
336514
Which of the following is a part of structural component and is not remobilised?
1 Phosphorous
2 Calcium
3 Nitrogen
4 Potassium
Explanation:
Some elements that are structural components like calcium are not remobilised.
BIOXI11: TRANSPORT IN PLANTS
336515
Actively transport of ions in only one direction is due to the presence of which layer in the endodermal cells of the root?
1 Lipid layer
2 Suberin
3 Cellulosic cell wall
4 Plasmodesmata
Explanation:
The root endodermis because of the layer of suberin has the ability to actively transport ions in one direction only.
BIOXI11: TRANSPORT IN PLANTS
336516
Which of the following change is observed due to decrease in concentration of solute in the guard cells?
1 Osmotic pressure increases
2 Water potential increases
3 Water potential decreases
4 More than one option are correct
Explanation:
The guard cells manufacture food by photosynthesis. It synthesizes glucose during the day time and so its water potential decreases and it withdraws water from the epidermal cell and turns turgid and the stomata opens and transpiration takes place. At night, when there is no light the amount of solute decreases in guard cell which leads to increase its water potential. The guard cell loses water and turns flaccid and the stomata closes, so the transpiration stops.
BIOXI11: TRANSPORT IN PLANTS
336517
Statement A : Specific proteins in the membranes of root hair cells actively pump ions from the soil into the cytoplasms of the epidermal cells. Statement B : Like all cells, the endodermal cells have many transport proteins embedded in their plasma membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
336513
Unloading of mineral ions occurs by which means of transport?
1 Pressure flow
2 Active transport
3 Diffusion
4 Both 2 and 3
Explanation:
Unloading of mineral ions occurs at the fine vein endings through diffusion and active uptake by these cells.
BIOXI11: TRANSPORT IN PLANTS
336514
Which of the following is a part of structural component and is not remobilised?
1 Phosphorous
2 Calcium
3 Nitrogen
4 Potassium
Explanation:
Some elements that are structural components like calcium are not remobilised.
BIOXI11: TRANSPORT IN PLANTS
336515
Actively transport of ions in only one direction is due to the presence of which layer in the endodermal cells of the root?
1 Lipid layer
2 Suberin
3 Cellulosic cell wall
4 Plasmodesmata
Explanation:
The root endodermis because of the layer of suberin has the ability to actively transport ions in one direction only.
BIOXI11: TRANSPORT IN PLANTS
336516
Which of the following change is observed due to decrease in concentration of solute in the guard cells?
1 Osmotic pressure increases
2 Water potential increases
3 Water potential decreases
4 More than one option are correct
Explanation:
The guard cells manufacture food by photosynthesis. It synthesizes glucose during the day time and so its water potential decreases and it withdraws water from the epidermal cell and turns turgid and the stomata opens and transpiration takes place. At night, when there is no light the amount of solute decreases in guard cell which leads to increase its water potential. The guard cell loses water and turns flaccid and the stomata closes, so the transpiration stops.
BIOXI11: TRANSPORT IN PLANTS
336517
Statement A : Specific proteins in the membranes of root hair cells actively pump ions from the soil into the cytoplasms of the epidermal cells. Statement B : Like all cells, the endodermal cells have many transport proteins embedded in their plasma membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
336513
Unloading of mineral ions occurs by which means of transport?
1 Pressure flow
2 Active transport
3 Diffusion
4 Both 2 and 3
Explanation:
Unloading of mineral ions occurs at the fine vein endings through diffusion and active uptake by these cells.
BIOXI11: TRANSPORT IN PLANTS
336514
Which of the following is a part of structural component and is not remobilised?
1 Phosphorous
2 Calcium
3 Nitrogen
4 Potassium
Explanation:
Some elements that are structural components like calcium are not remobilised.
BIOXI11: TRANSPORT IN PLANTS
336515
Actively transport of ions in only one direction is due to the presence of which layer in the endodermal cells of the root?
1 Lipid layer
2 Suberin
3 Cellulosic cell wall
4 Plasmodesmata
Explanation:
The root endodermis because of the layer of suberin has the ability to actively transport ions in one direction only.
BIOXI11: TRANSPORT IN PLANTS
336516
Which of the following change is observed due to decrease in concentration of solute in the guard cells?
1 Osmotic pressure increases
2 Water potential increases
3 Water potential decreases
4 More than one option are correct
Explanation:
The guard cells manufacture food by photosynthesis. It synthesizes glucose during the day time and so its water potential decreases and it withdraws water from the epidermal cell and turns turgid and the stomata opens and transpiration takes place. At night, when there is no light the amount of solute decreases in guard cell which leads to increase its water potential. The guard cell loses water and turns flaccid and the stomata closes, so the transpiration stops.
BIOXI11: TRANSPORT IN PLANTS
336517
Statement A : Specific proteins in the membranes of root hair cells actively pump ions from the soil into the cytoplasms of the epidermal cells. Statement B : Like all cells, the endodermal cells have many transport proteins embedded in their plasma membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
336513
Unloading of mineral ions occurs by which means of transport?
1 Pressure flow
2 Active transport
3 Diffusion
4 Both 2 and 3
Explanation:
Unloading of mineral ions occurs at the fine vein endings through diffusion and active uptake by these cells.
BIOXI11: TRANSPORT IN PLANTS
336514
Which of the following is a part of structural component and is not remobilised?
1 Phosphorous
2 Calcium
3 Nitrogen
4 Potassium
Explanation:
Some elements that are structural components like calcium are not remobilised.
BIOXI11: TRANSPORT IN PLANTS
336515
Actively transport of ions in only one direction is due to the presence of which layer in the endodermal cells of the root?
1 Lipid layer
2 Suberin
3 Cellulosic cell wall
4 Plasmodesmata
Explanation:
The root endodermis because of the layer of suberin has the ability to actively transport ions in one direction only.
BIOXI11: TRANSPORT IN PLANTS
336516
Which of the following change is observed due to decrease in concentration of solute in the guard cells?
1 Osmotic pressure increases
2 Water potential increases
3 Water potential decreases
4 More than one option are correct
Explanation:
The guard cells manufacture food by photosynthesis. It synthesizes glucose during the day time and so its water potential decreases and it withdraws water from the epidermal cell and turns turgid and the stomata opens and transpiration takes place. At night, when there is no light the amount of solute decreases in guard cell which leads to increase its water potential. The guard cell loses water and turns flaccid and the stomata closes, so the transpiration stops.
BIOXI11: TRANSPORT IN PLANTS
336517
Statement A : Specific proteins in the membranes of root hair cells actively pump ions from the soil into the cytoplasms of the epidermal cells. Statement B : Like all cells, the endodermal cells have many transport proteins embedded in their plasma membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
