Transport in Plants Test

Result

Transport in Plants Test - 44

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

I. Assertion : Sugar is translocated to buds for growing them into flowers.
II. Reason : Xylem transport food in the plant.

A
I and II both are correct and II is correct explanation for I

B
I is correct and II is incorrect

C
I and II both are false

D
I and II both are correct but II is not correct explanation to I
Question 2
1 / -0

The movement in phloem is______

A
Uni-directional

B
Bi-directional

C
Multi-directional

D
A and C

Solution

Phloem is responsible for transport of food and minerals. Food synthesized in photosynthetic parts is translocated to non-photosynthetic parts through phloem. Food is transported in multi-directional fashion.
Question 3
1 / -0

In higher plants, continuity of cytoplasm from one cell to its neighboring cells is established through the

A
Apoplast

B
Chloroplast

C
Leucoplast

D
Symplast

Solution

a) In apoplast pathway water moves exclusively through the cell wall without crossing any membranes. It is the continuous system of cell walls and intercellular air spaces in plant tissues.
b) Chloroplasts are the green coloured plastids. These are protoplasmic organelles present only in the green cells of the plants.
c) Leucoplasts are the colourless plastids which are meant for storage purposes. These are further categorised into elaioplasts (those store oil), amyloplasts (those store starch) and proteinoplasts (those store proteins).
d) In the symplast pathway, water travels from one cell to the next via plasmodesmata. The symplast consists of an entire network of cell cytoplasm interconnected by plasmodesmata.
Hence, continuity of cytoplasm from one cell to its neighbouring cells is established through the symplast.
So, the correct answer is D.
Question 4
1 / -0

Read the given passage and answer the following question.

Wet mounts of three living samples of Elodea cells are prepared for viewing under the light microscope. Each slide is mounted with a different solution and viewed after 5 minutes.
Sample A - Elodea + 5 drops of 10% NaCl
Sample B - Elodea + 5 drops of Isotonic saline
Sample C - Elodea + 5 drops of distilled water

Which of the following process is illustrated by the experiment?

A
Hydrolysis

B
Dehydration

C
Active transport

D
Polymerization

E
Osmosis

Solution

Cells in three samples are placed in solutions of different concentration that caused movement of water in either direction through the semipermeable cell membrane. The water movement was in accordance with the concentration difference of cells and surrounding medium. Osmosis is the passive movement of the solvent through a semipermeable membrane down the concentration gradient. Thus, the correct answer is C.
Question 5
1 / -0

A professor wanted to demonstrate a physiological process. He filled a glass bottle with previously moistened gram seeds. He capped the bottle tightly and kept it away in a corner, and resumed the lecture. After about 45 minutes there was a sudden explosion with shattering of the glass bottle into pieces of glass. Which of the following phenomenon did the professor wants to demonstrate?

A
Diffusion

B
Imbibition

C
Anaerobic respiration

D
Osmosis

Solution

During those 45 mins, imbibition took place. Imbibition is a special type of diffusion when water was absorbed by these moistened gram seeds. This developed into a higher pressure called as imbibition pressure, which lead to the shattering of glass.
Thus, the correct answer is option (B).
Question 6
1 / -0

The correct ascending order of the cell with respect to their water potential is
A B C D
$$\pi$$-0.8Mpa -1.0 Mpa -0.9MPa -0.3 MPa
P+0.4 Mpa +0.5Mpa +0.2Mpa 0.2Mpa

A
A, B, C, D

B
C, B, A, D

C
C, A, B, D

D
C, D, B, A

Solution

In the given question, π represents solute potential and P represents pressure potential. Water potential can be calculated as :
Water potential (Ψw) = π + P
Ψw of cell A = -0.8+0.4 = -0.4 MPa
Ψw of cell B = -1.0+0.5 = -0.5 MPa
Ψw of cell C = -0.9+0.2 = -0.7 MPa
Ψw of cell D = -0.3+0.2= -0.1 MPa
Ascending order of the cell with respect to their water potential is:
C (-0.7 MPa), B (-0.5 MPa), A (-0.4 MPa), D (-0.1 MPa)
Note: the more negative is the value, the smaller is water potential.
So, the correct answer is B.
Question 7
1 / -0

What would happen to red blood cells in a hypotonic solution?

A
They would shrink due to osmotic water loss.

B
They would rupture due to the influx of water.

C
They would retain their shape due to the cell wall.

D
They would swell but avoid rupturing due to the cell wall.

E
They would pump out excess water with the contractile vacuole.

Solution

A blood cell placed in hypotonic solution would gain water as water will enter cell from surrounding hypotonic medium by the process of osmosis causing the cell to swell up. If the cell was placed in hypertonic solution, water would have moved out of the cell causing it to shrink. Red blood cells do not have the cell wall and contractile vacuoles and hence, would not be able to maintain their shape leading to their rupture. Thus, the correct answer is B.
Question 8
1 / -0

A student cut a 2cm$$^3$$ block out of a potato and weighed the block. She then placed the block in distilled water and waited for an hour. Which of the following conditions will occur when she reweighs the block?

A
The mass increases due to plasmolysis.

B
The mass increases because the potato is hypertonic to the water.

C
The mass decreases because the potato will loose its water

D
The mass decreases because of the higher water potential in the potato.

E
The mass remains the same because there are no living components in this system.

Solution

Potato cell interior is hypertonic than distilled water. The cell membrane of potato cells works as semipermeable membrane and water enter into the cell down the concentration gradient by the process of osmosis. Endosmotic movement of water inside the potato cells caused an increase in its mass. Thus, the correct answer is option B.
Question 9
1 / -0

What would happen to a plant cell placed in a hypotonic solution?

A
Lyse

B
Swell but remain intact

C
Shrivel

D
Remain unchanged

E
Take up solutes

Solution

Plant cells are enclosed by rigid cell walls. When it is placed in a hypotonic solution (the solution which has a lower solute concentration than the cell), the process of osmosis takes place. Water moves from external environment to the cell and thus, the cells start to swell, however, rigid cell walls prevent it from bursting and therefore it remains intact and cells become turgid (that is swollen and hard).
Hence option B is correct.
Question 10
1 / -0

The process responsible for the movement of water from roots to all other parts of plants is

A
Evaporation of water from the leaves.

B
Capillary action.

C
Hydrophyllic compounds.

D
Active transport.

E
Both A and B.

Solution

The upward movement of water from roots to the aerial parts of the plant is called ascent of sap. Most accepted theory for the ascent of sap is the cohesion adhesion tension theory which is based on that there is a continuous column of water from the roots to the leaves. When transpiration takes place, water evaporates from the intercellular spaces of the leaves into the outer atmosphere through the stomata. Due to water loss, osmotic pressure of the leaf cells increases. As a result, water potential of the cells become low and water from the leaf veins (xylem) moves into the leaf cells. The xylem vessels in turn draw water from the xylem of the main stem. This creates a pull which is known as transpiration pull. The lumen of tracheids and vessels of a xylem link to form a narrow tube and water rises in the narrow tube due to the force of surface tension. This phenomenon is known as capillarity. Thus water moves from the roots to all other parts due to capillary action and the pull created due to evaporation of water from the leaves. Hence both options A and B are correct.
So, the correct answer is both A and B.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

A	B	C	D
$$\pi$$-0.8Mpa	-1.0 Mpa	-0.9MPa	-0.3 MPa
P+0.4 Mpa	+0.5Mpa	+0.2Mpa	0.2Mpa

Transport in Plants Test - 44

Result

Transport in Plants Test - 44

Score

-

Rank

-

SHARING IS CARING

Question 1

I and II both are correct and II is correct explanation for I

I is correct and II is incorrect

I and II both are false

I and II both are correct but II is not correct explanation to I

Question 2

Uni-directional

Bi-directional

Multi-directional

A and C

Solution

Question 3

Apoplast

Chloroplast

Leucoplast

Symplast

Solution

Question 4

Hydrolysis

Dehydration

Active transport

Polymerization

Osmosis

Solution

Question 5

Diffusion

Imbibition

Anaerobic respiration

Osmosis

Solution

Question 6

A, B, C, D

C, B, A, D

C, A, B, D

C, D, B, A

Solution

Question 7

They would shrink due to osmotic water loss.

They would rupture due to the influx of water.

They would retain their shape due to the cell wall.

They would swell but avoid rupturing due to the cell wall.

They would pump out excess water with the contractile vacuole.

Solution

Question 8

The mass increases due to plasmolysis.

The mass increases because the potato is hypertonic to the water.

The mass decreases because the potato will loose its water

The mass decreases because of the higher water potential in the potato.

The mass remains the same because there are no living components in this system.

Solution

Question 9

Lyse

Swell but remain intact

Shrivel

Remain unchanged

Take up solutes

Solution

Question 10

Evaporation of water from the leaves.

Capillary action.

Hydrophyllic compounds.

Active transport.

Both A and B.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday