Transport in Plants - Online Test
Q1. Which of the following has highest water potential?
Answer : Option A
Explaination / Solution:
Distilled water do not contain any kind of salt in it so its water potential is 0. Addition of solute results into further decrease in water potential in negative term.
Q2. In which type of solution, the living cell is placed in figure given below
Answer : Option D
Explaination / Solution:
If the external solution is more concentrated, it is hypertonic. Cells shrink in hypertonic.
Q3. Select the correct equation from the following
Answer : Option C
Explaination / Solution:
Water potential of a cell is affected by both solute and pressure potential. The relationship between them is as follows:
Q4. Which one is not shown by plasmolysis
Answer : Option A
Explaination / Solution:
Plasmolysis is the shrinking of cell membrane due to exosmosis. Plasmolysis shows that cell membrane is semipermeable and elastic but do not show that cell wall is semipermeable.
Q5. otal water content presenTt in the soil is called
Answer : Option B
Explaination / Solution:
Total water content present in the soil is called holard. Out of this, the water which can be absorbed by the plant is called chresard and remaining is called echard.
Q6. The correct order for instrument used for measuring stomatal size, atmospheric pressure and osmosis is
Answer : Option A
Explaination / Solution:
Porometer is used to measure stomatal size, monometer is used to measure atmospheric pressure and osmometer is used to measure osmosis.
Q7. If an osmotic system, one has a water potential of -1000 kPa while the other has -500kPa, which chamber has higher water potential?
Answer : Option A
Explaination / Solution:
Water potential of distilled water is 0. Presence of more solute reduce the water potential. So one having water potential -500 kPa is higher in comparison to one having -1000kPa water potential.
Q8. A water melon has water percentage about
Answer : Option C
Explaination / Solution:
Each bite of watermelon contains about 92 percent water and 6 percent sugar. Since it consists mostly of water, its name makes perfect sense! Despite being mostly water with a bit of sugar, watermelon is considered a very healthy snack. Its high water content helps keep you hydrated.
Q9. The absorption of water by seeds and drywood takes place by a special type of diffusion called
Answer : Option A
Explaination / Solution:
Imbibition is a special type of diffusion when water is absorbed by solids-colloids causing an enormous increase in volume. Examples include the absorption of water by seeds and dry wood.
Q10. Osmotic pressure cannot became zero in a cell. It is zero only in case of
Answer : Option A
Explaination / Solution:
Osmotic pressure cannot become zero in cell as it always content some amount of solute particles. Osmotic pressure is zero only in case of pure water or distilled water.
