MCQ Questions for Class 11 Medical Biology Transport In Plants Quiz 5

Which phenomenon is exhibited here?

0%
Hydathode
0%
Tracheids
0%
Epithem cells
0%
Mesophyll cell
0%
Guttation

A storage organ is a part of a plant specifically modified for storage of energy generally in the form of

0%
Carbohydrates
0%
Water
0%
Both A and B
0%
None of the above

Which of the tissue is more important for translocation of sucrose?

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Xylem
0%
Phloem
0%
Both of the above
0%
None of the above

The cause of guttation is mainly due to

0%
Root pressure
0%
Osmosis
0%
Transpiration pull
0%
Cohesive force

Organic substances such as sugars are translocated in phloem can be demonstrated by

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Defoliation
0%
Girdling the stem
0%
Grafting
0%
Root pressure

The process of water exudation through the hydathode is called as

0%
Guttation
0%
Transpiration
0%
Excretion
0%
Hydrolysis

Match the labeling of the structures A to E.
a. Hydathode pore or stoma
b. Tracheids
c. Epithem cells
d. Mesophyll cell
e. Guttation
f. Water and minerals
g. Water drop

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A- g, B- a, C- b, D- d, E- c
0%
A- g, B- a, C- b, D- c, E- d
0%
A- a, B- g, C- b, D- d, E- c
0%
A- c, B- a, C- b, D- d, E- g

Mass-flow hypothesis is also known as

0%
Pressure flow hypothesis
0%
Accelerated diffusion theory
0%
Conventional flow hypothesis
0%
All of the above

Translocation of food is:

0%
Unidirectional
0%
Omnidirectional
0%
Bidirectional
0%
Multidirectional

Which of the following is imbibiant?

0%
Proteins
0%
Pectin
0%
Starch
0%
All of the above

A is rich in

0%
Hydathode
0%
Tracheids
0%
Epithem cells
0%
Mesophyll cell
0%
Guttation
0%
Water and minerals
0%
Water drop

Loosely placed cells in a hydathode are known as

0%
Complementary
0%
Subsidiary
0%
Phellic
0%
Epithems

One molar solution of which substance will have maximum O.P?

0%
NaCl
0%
Glucose
0%
Fructose
0%
Starch

Water enters into the root hair from the soil in its normal condition because the osmotic pressure of the soil solution

0%
Remains lesser than that of root hair sap
0%
Remains equal to that of root hair sap
0%
Remains higher than that of root hair sap
0%
Remains zero of root hair sap

Plasma membrane controls

0%
Passage of water only
0%
Passage of water and solutes in and out of the cell
0%
Passage of water and solutes into the cell only
0%
Movement of cell contents out the cell only

Osmotic pressure is highest in

0%
Xerophytes
0%
Lithophytes
0%
Halophytes
0%
Mesophytes

Casparian strip occurs in:

0%
Pericycle
0%
Endodermis
0%
Epidermis
0%
Cortex

Food synthesized in the leaves is transported to other parts by

0%
Translocation
0%
Nastic movement
0%
Chemotaxis
0%
Phototaxis

Explanation

$\textbf{Correct option: }$ A

$\textbf{ Solution: }$

$\textbf{ Option (A): }$

$\bullet$ The process of translocation in plants is defined as the movement of substances like amino acids and sucrose.

$\bullet$ This is a process which allows the relocation of the substances to happen in the internal body plant body.

$\textbf{ Option (B): }$

$\bullet$ Mimosa pudica is a sensitive plant which is also known as touch-me-not plant shows nastic movement caused by touch.

$\textbf{ Option (C): }$

$\bullet$ Chemotaxis is the movement of a motile cell or organism, in the direction of the increased concentration gradient of a particular type of substance.

$\textbf{ Option (D): }$

$\bullet$ Phototaxis is the orientation of free moving organisms towards the direction of light.

Hence, the correct answer is option (A).

The physical process involved in the release of molecular oxygen from leaves is

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Diffusion
0%
Transpiration
0%
Osmosis
0%
Capillarity

The volume of

${O_2}$ liberated in photosynthesis has which of the following ratio to

${C O _2}$ ?

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${O_2 / C O _2 = 1}$
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${O_2 / C O _2 = 1/2}$
0%
${O_2 / C O _2 = 2/1}$
0%
${O_2 / C O _2 = 3/1}$

The loss of water from the plants is known as

0%
Respiration
0%
Transpiration
0%
Replication
0%
Ascent of sap

The accurate relationship between SP, OP, TP can be expressed as

0%
SP = OP + TP
0%
OP = SP - TP
0%
TP = SP - OP
0%
SP = OP - TP

Water lost in guttation is

0%
Pure water
0%
Impure water
0%
In vapour form
0%
None of the above

Seeds swell when placed in water due to

0%
Hydrolysis
0%
Imbibition
0%
Both A and B
0%
None of the above

Osmotic potential is numerically equal to

0%
Turgor pressure
0%
Wall pressure
0%
Osmotic pressure
0%
D.P.D.

The osmotic pressure is due to

0%
Solute
0%
Semi permeable membrane
0%
Hypertonic solution
0%
Water

The best condition by which fully turgid cell can be identified is

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TP is minimum
0%
SP is maximum
0%
OP less than SP
0%
TP $=$ OP

The osmotic pressure of the cell is measured by

0%
Plasmolysis method
0%
Osmometer
0%
Molar concentration of the cell sap
0%
Deplasmolysis

Select the correct statement.

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Pure water has minimum $\psi_w$ .
0%
Pure water has maximum $\psi_w$ .
0%
Pure water has maximum D.P.D.
0%
Pure water has variable $\psi_w$ and DPD.

The direction of the movement of water

0%
From low OP to high OP
0%
From low DPD to high DPD
0%
From high TP to low TP
0%
All of the above

The osmotic pressure of distilled water will be

0%
Minimum
0%
Maximum
0%
Higher than any solution
0%
Variable

Maximum osmotic pressure is found in

0%
Root hair
0%
Cortex cell of the root
0%
Passage cell of the root
0%
Mesophyll cell

Explanation

$\textbf{Correct Option D}$

$\textbf{Solution}$

$\bullet$ Osmotic pressure is the pressure which is applied to a solution in order to prevent the inward flow of the pure solvent through the semipermeable membrane. It can easily be stated as the measure of the tendency of any solution in order to take up the pure solvent through osmosis.

$\bullet$ If the concentration of the solute particles are more in the solution then the Osmotic pressure of the solution will also be more because the solution will gain water when it is in contact with a solution having lesser osmotic pressure ( less concentration of solute particles).

$\bullet$ We know that plants gain water from the soil through the the root cortex cells which then transfers to the vascular tissues and lastly to the mesophyll cells of the leaf.

$\bullet$ The water molecules have to travel a very long path starting from the cortex cells of the root to the mesophyll cells of the leaf. So it is very clearly observed that the leaf mesophyll cells should have the maximum osmotic pressure so that it will be able to absorb water.

$\bullet$ So, the correct option is D.

Plasmolysis can be used for

0%
Good growth of plants
0%
Good growth of weeds
0%
Killing the weeds
0%
None of the above

Bacteria can not survive in a highly salted pickle, because

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Salt inhibits reproduction of bacteria.
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Enough light is unavailable for photosynthesis.
0%
They become plasmolysed and death occurs.
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Nutrients in the pickle medium can not support life.

If there is high amount of fertilizer present in soil and it is deficient in water, then what will be the effect?

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Over growth
0%
Under growth
0%
No effect
0%
Wilting of plants

If a plasmolysed cell is placed in distilled water then it returns to its original state and become turgid, this is called as

0%
Plasmolysis
0%
Exosmosis
0%
Endosmosis
0%
Deplasmolysis

Loss of water from tips of leaves is called as

0%
Bleeding
0%
Guttation
0%
Respiration
0%
Transpiration

Osmotic potential (

$\psi_S$ ) of a solution is always

0%
Positive
0%
Negative
0%
Zero
0%
Variable

When the solute has been added to the solution; its water potential will

0%
Increase
0%
Decrease
0%
Remain unchanged
0%
First increase then decrease

Water potential is affected by

0%
Osmotic potential
0%
Matrix potential
0%
Pressure potential
0%
All of the above

Value of water potential for pure water is

0%
1
0%
2
0%
3
0%
0

Root pressure is measured by

0%
Manometer
0%
Potometer
0%
Auxanometer
0%
Osmometer

Why hygroscopic water is not available to plants?

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Because its $\psi_\omega$ is greatly increased
0%
Because its DPD is greatly decreased
0%
Because its $\psi_\omega$ is strongly negative
0%
Because its $\psi_\omega$ is increased and DPD is decreased

0.1 M solution has water potential of

0%
-2.43 bars
0%
0 bar
0%
22.4 bars
0%
+2.3 bars

The water potential and osmotic potential of pure water is respectively

0%
100 and 0
0%
0 and 0
0%
100 and 200
0%
0 and 100

A root hair cell under ordinary conditions have a water potential in the range of

0%
1 to 4 atm
0%
-1 to - 4 atm
0%
1 to 2 atm
0%
-1 to 2 atm

The concept of water potential was propounded by

0%
Robert mayer
0%
Abbe Nollet
0%
Slatyer and Taylor
0%
Levitt

Solute potential can be expressed as

0%
$\Psi s\, =\, -\, OP$
0%
$\Psi s\, =\, OP$
0%
$OP\, -\, \Psi s\, =\, 0$
0%
$\displaystyle \frac{\Psi s}{OP}\, =\, 0$

The direction of the water flow in given cells X, Y and Z can be represented as

0%
$X \rightarrow\, Y\, \leftarrow\, Z$ .
0%
$X\, \rightarrow\, Y\, \rightarrow\, Z$ .
0%
$X\, \leftarrow\, Y\, \leftarrow\, Z$ .
0%
$X\, \leftarrow\, Y\, \rightarrow\, Z$ .

The solute potential can be determined in a simple manner by

0%
Water potential
0%
DPD
0%
Osmotic pressure
0%
Suction pressure

CBSE Questions for Class 11 Medical Biology Transport In Plants Quiz 5 - MCQExams.com

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Practice Class 11 Medical Biology Quiz Questions and Answers

CBSE Questions for Class 11 Medical Biology Transport In Plants Quiz 5 - MCQExams.com

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Practice Class 11 Medical Biology Quiz Questions and Answers

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