Transport in Plants Test

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Transport in Plants Test - 32

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Question 1
1 / -0

Which process occurs against a concentration gradient of solute?

A
Diffusion

B
Osmosis

C
Transpiration

D
Translocation

Solution

Osmosis is defined as the movement of solvent (water) molecules from a region of their high concentration (less concentrated solution) to a region of their low concentration (more concentrated solution) through a semipermeable membrane. In osmosis water is flowing down its concentration gradient, which is opposite to the concentration gradient of the solute.
Question 2
1 / -0

Process of selective transmission of a liquid through semi permeable membrane is called as

A
Diffusion

B
Osmosis

C
Plasmolysis

D
Transmission

Solution

Osmosis is a special type of diffusion. Osmosis is defined as the movement of solvent (water in living systems) particles/ molecules from a region of their higher concentration (more dilute solution) to a region of their lower concentration (more concentrated solution), through a semipermeable membrane.
Question 3
1 / -0

Plasma membrane controls

A
Passage of water only

B
Passage of water and solutes in and out of the cell

C
Passage of water and solutes into the cell only

D
Movement of cell contents out the cell only

Solution

Plasma membrane is a living entity, which encloses all living cells. Plasma membrane forms the boundary between living systems and the environment. Plasma membrane regulates both entry and exit of both solute and solvent between cell and the environment. With regards to permeability characteristics, plasma membrane can be permeable (allows free to and fro passage of both solute and solvent), impermeable (does not allows passage of solute or solvent), semi permeable (allows free passage of solvent), selectively permeable (allows solvent and selected solute particles to pass through).
Question 4
1 / -0

Osmotic pressure is highest in

A
Xerophytes

B
Lithophytes

C
Halophytes

D
Mesophytes

Solution

Halophytes live in conditions which are physiologically dry. The water is present in highly concentrated salt solution. Hence, to absorb water, halophytes maintain very high osmotic pressure in their cells. The cell sap should be more concentrated as compared to the environment, then only halophytes can absorb water.
Question 5
1 / -0

Who propounded the concept of osmosis?

A
Abbe Nollet

B
Mayer

C
Dixon and Jolly

D
Renner

Solution

In 1748, Abbe Nollet filled a pig's bladder with water and alcohol obtained from fermenting grains. He then placed the bladder in water. The bladder swelled as water entered it. However, to his surprise, the alcohol remained inside the bladder.
Nollet's observation were possible because of difference in water potential between the inside and outside the bladder. This is a special kind of diffusion called as osmosis.
Question 6
1 / -0

Osmosis involves diffusion of

A
Suspended particles from higher to lower concentration

B
Suspended particles from lower to higher concentration

C
Water from more to less concentrated solution

D
Water from less to more concentrated solution

Solution

Osmosis is a special type of diffusion. Osmosis is defined as the movement of solvent (water in living systems) particles/ molecules from a region of their higher concentration (more dilute solution) to a region of their lower concentration (more concentrated solution), through a semipermeable membrane.
Question 7
1 / -0

The osmotic pressure of distilled water will be

A
Minimum

B
Maximum

C
Higher than any solution

D
Variable

Solution

The osmotic pressure of a solution depends on the concentration of solute particles. The osmotic pressure of a solution is defined as the pressure that must be exerted on the side of a selectively permeable membrane containing the higher concentration of solute to prevent the diffusion of water (by osmosis) from the side containing the lower solute concentration. In a distilled water concentration of solutes is expected to be minimum. Hence, distilled water will have least osmotic pressure.
Question 8
1 / -0

Osmosis means

A
Movement of molecules from higher concentration to lower concentration.

B
Uptake of water by roots.

C
Passage of solvent from a weaker solution to stronger solution across a semipermeable membrane.

D
Passage of solvent from a weaker to a stronger solution separated by a membrane.

Solution

Osmosis is a special type of diffusion. During osmosis, solvent (water) molecules flows from a region of their higher concentration (dilute solution) to a region of their lower concentration (concentrated solution), across a semipermeable membrane.
Question 9
1 / -0

If the molar concentration of the given sugar solution is 0.3 M, find out the osmotic pressure of this solution.

A
7.33 atm

B
6.72 atm

C
2.24 atm

D
5.60 atm

Solution

Take the following values universal gas constant or R as .082 lit atm per degree kelvin per mole; temperature 298 Kelvin; given 0.3 M solution thus volume is 1 liter.
Substitute the values in universal equation PV equals to nRT and solve to get a value of 7. 33 atmospheres.
Question 10
1 / -0

Osmosis is the phenomenon expressed by

A
Solutes present in the solution

B
Solution

C
Semi-permeable membrane

D
$$O_2$$

Solution

Osmosis is defined as the movement of solvent (water) molecules from a region of their high concentration to a region of their lower concentration across a semipermeable (half permeable- which allows movement of solvent not solute) membrane.

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Transport in Plants Test - 32

Result

Transport in Plants Test - 32

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SHARING IS CARING

Question 1

Diffusion

Osmosis

Transpiration

Translocation

Solution

Question 2

Diffusion

Osmosis

Plasmolysis

Transmission

Solution

Question 3

Passage of water only

Passage of water and solutes in and out of the cell

Passage of water and solutes into the cell only

Movement of cell contents out the cell only

Solution

Question 4

Xerophytes

Lithophytes

Halophytes

Mesophytes

Solution

Question 5

Abbe Nollet

Mayer

Dixon and Jolly

Renner

Solution

Question 6

Suspended particles from higher to lower concentration

Suspended particles from lower to higher concentration

Water from more to less concentrated solution

Water from less to more concentrated solution

Solution

Question 7

Minimum

Maximum

Higher than any solution

Variable

Solution

Question 8

Movement of molecules from higher concentration to lower concentration.

Uptake of water by roots.

Passage of solvent from a weaker solution to stronger solution across a semipermeable membrane.

Passage of solvent from a weaker to a stronger solution separated by a membrane.

Solution

Question 9

7.33 atm

6.72 atm

2.24 atm

5.60 atm

Solution

Question 10

Solutes present in the solution

Solution

Semi-permeable membrane

$$O_2$$

Solution

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