Consider the two statements:
I. After plasmolysis the gap between the cell wall and the cell membrane in a plant cell is filled with hypertonic solution.
II. The cell collapses, and the cell membrane pulls away from the cell wall (in plants).
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect

The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and early morning is:

1. Root pressure

2. Imbibition

3. Plasmolysis

4. Transpiration

What is not true regarding bulk transport in plants?
1. It is driven primarily by pressure potential.
2. It depends on a difference in pressure potential at the source and sink.
3. Substances in a solution or suspension move along their individual concentration gradients
4. It may be the result of either positive or negative pressure potential.

A water molecule taken up by the root of the plant from the soil can reach the leaf by passing through a living cell only once. This cell is:
1. root epidermal cell
2. the endodermis
3. a guard cell
4. the root cortex cell

Identify the incorrect statement:
1. The water potential of pure water at standard temperature, which is not under any pressure, is taken to be zero.
2. Adding solute to pure water reduces its water potential.
3. The more the solute molecules, the lower [more negative] is the solute potential.
4. If a pressure greater than atmospheric pressure is applied to pure water or a solution, its water potential decreases.

Both simple diffusion and facilitated diffusion:
1. require special membrane proteins
2. are highly selective in nature
3. do not require ATP energy
4. are uphill transports

Select the incorrect statement.

What will be the direction of flow of water when a plant cell is placed in a Hypotonic solution?

1. Water will flow in both directions.

2. Water will flow out of the cell.

3. Water will flow into the cell.

4. No flow of water in any direction.

Which of the following is not a feature of the active transport of solutes in plants?

1. Occurs against the concentration gradient

2. Non-selective

3. Occurs through membranes

4. Requires ATP

The main difference between active and passive transport across cell membrane is :