Means of Transport in Plants

Q.

Why do seeds swell when placed in water?

Q. Diffusion require a semi permeable membrane.

1. does
2. may
3. does not
4. can

Q.

Assertion (A): Active transport is uphill transport.

Reason (R): Active transport uses energy to pump molecules against the concentration gradient.

1. Both A & R are true and R explains A

2. Both A & R are true and R doesn't explain A

3. A is true and R is false

4. Both A & R are false

Q.

The angle of contact for the liquid which wets the walls of the vessel is

Q.

In which direction does the water moves in xylem?

Q. __________ process refers to the movement of solute molecules from a region of higher concentration to a region of lower concentration.

1. Active transport
2. Diffusion
3. Osmosis
4. Imbibition

Q.

Why does a closed can of dried seeds burst open if some water enters into it accidentally?

Q. The movement of water through a semi-permeable membrane from a region of its higher concentration to a region of its lower concentration is specifically called:

1. Diffusion
2. Active Transport
3. Osmosis
4. Imbibition

Q. Explanation on the sodium pump.

Q.

Stomata:Transpiration :: Hydathodes: _______________

1. Bleeding

2. Guttation

3. Photosynthesis

4. Respiration

Q. The pressure required to prevent the entry of water into an osmotically active solution is called .

1. water pressure
2. solute pressure
3. osmotic pressure

Q.

When the cell is placed in a hypotonic solution it

1. bursts

2. remains the same

3. becomes flaccid

4. becomes turgid

Q.

Does active transport require ATP energy?

Q. Unidirectional movement of substances occurs through

1. xylem and phloem
2. phloem
3. xylem
4. None of these

Q.

What are 2 types of active transport?

Q.

The process involves the movement of substances against the concentration gradient using ATP.

Q.

Is ATP used in secondary active transport?

Q.

Why are farmers advised to water the crop field after chemical fertilisers are used?

1. Plants die due to reduced photosynthetic rate

2. Plants die due to excess nitrates in soil

3. Plants die due to plasmolysis

4. Plants die due to enhanced diffusion rate

Q.

What is the simplest type of transport?

1. Active transport

2. Passive transport

3. Diffusion

4. Faciliated Diffusion

Q. Which of the following process involves movement of the water molecules from a high concentration region to a low concentration region through a semipermeable membrane?

1. Active transport
2. Diffusion
3. Osmosis
4. Imbibition

Q.

In the leaves of strawberry, [shown in picture below] what causes the water droplets formation at the edge of leaf in the absence of dew in atmosphere?

1. Transpiration

2. Osmosis

3. Root pressure

4. Diffusion

Q.

What do you mean by tonicity of cell?When do cells become turgid and plasmolyses?Explain why?

Q.

Does active transport require energy?

Q.

What is the term used for two solutions having the same osmotic pressure at a given temperature?

Q.

How does ATP enable transport proteins to move?

Q.

Transpiration facilitates the ___ and___ in plants.

1. ascent of sap and cellular respiration

2. ascent of sap and cooling

3. translocation and photosynthesis

4. ascent of sap and photosynthesis.

Q.

List two points of differences between the following.

Active transport and passive transport.

Q. What would be present in between plasma membrane and cell wall in a plasmolysed cell?

1. Hypertonic solution only
2. Solutes only
3. Hypertonic solution and water lost from cell gap
4. Gases

Q.

Fill in the blanks with the right words from the bracket.

The greater the thickness of the cuticle, the _________ the transpiration. (lesser/greater)

Q. Which of the following process requires ATP to facilitate movement of the solute molecules against their concentration gradient?

1. Diffusion
2. Osmosis
3. Imbibition
4. Active transport