Active Transport

Q.

Why is the process of osmosis important in living organisms?

1. All of the above

2. Osmosis helps to maintain shape and size of animal cells.

3. Absorption of water by intestinal cells takes place through osmosis.

4. Plants absorb water from the soil with the help of root hair through osmosis.

Q.

The process by which water particles move from a lower concentration to higher concentration is known as

1. translocation

2. osmosis

3. active transport

4. diffusion

Q.

The process of movement of molecules from the area of lower concentration to the area of higher concentration is called:

1. Osmosis

2. Filtration

3. Passive transport

4. Active transport

Q.

Guttation is the result of______.

1. Osmosis

2. Transpiration

3. Root pressure

4. Diffusion

Q.

CHOOSE THE CORRECT OPTION :

1) Minerals from soil are absorbed by root hair by the mechanism of

a) Diffusion C) Active Transport

b) Osmosis. D) Selective Transport

(( Give reason for supporting your answer ))

Q.

Sucrose enters a phloem sieve-tube cell because of:

1. Osmosis

2. Active transport

3. Water potential

4. A process regulated by auxin

Q.

How is the movement of water in terms of DPD?

Q.

The physiological process that helps in the uptake of water and salts in plants is

1. diffusion

2. photosynthesis
   

3. respiration

4. osmosis
   

Q. is an energy dependent process that moves molecules across a membrane against its concentration gradient.

1. Osmosis
2. Active transport
3. Diffusion

Q.

The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is known as:

1. Active absorption

2. Passive absorption

3. Osmosis

4. Diffusion

Q.

Transportation of minerals across root hair occurs due to ___ .

1. Passive absorption

2. Active absorption

3. Both a & b

4. Neither a nor b

Q.

Are active transport and ascent of sap same?

If not what's the difference.

Q.

Write the two types of movements involved in the transport of substances in plants.

Q.

Plants cannot rely on diffusion for transport of nitrates from roots to other parts of plants body.

1. True

2. False

Q.

Raisins absorb water by___________.

1. osmosis

2. simple diffusion

3. imbibition

4. active absorption

Q. Sieve tubes are characterised by

1. Simple oblique septa
2. Absence of septa
3. Perforated longitudinal walls
4. Perforated oblique septa

Q. The movement of water in xylem is bidirectional.

1. True
2. False

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. osmosis
   
3. active transport
4. imbibition
   

Q.

what is active transport?

Q.

Define active transport?

Q. Diffusion takes place through a semi-permeable membrane.

1. True
2. False

Q.

Which of the following are a part of xylem?

1. simple diffusion

2. osmosis

3. active transport

4. facilitated diffusion

Q. Describe how root hair helps in the absorption of water from the soil

Q. How do microorganisms helps in waste treatement?

Q.

diferenciate between 1)osmosis n diffusion

rn

2)diffusion n active transport

rn

3)active transport n osmosis

Q. Assertion :In plants vessels are better conductors than tracheids. Reason: Vessel elements are shorter than tracheids.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Tracheary elements are involved in

1. Mechanical strength
2. Conduction of minerals
3. Food trasnlocation
4. Both A and C

Q. Which of the following has perforated wall?

1. Vessel
2. Sclereid
3. Fibre
4. Tracheid

Q. Cells in which end walls are absent are

1. Parenchyma
2. Vessels
3. Sclerenchyma
4. Sieve tubes

Q. Mention if the following statement is true (T) or false (F)
The older xylem tissue does not participate in transport

1. True
2. False