We have compiled the NCERT MCQ Questions for Class 11 Biology Chapter 11 Transport in Plants with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 11 Biology with Answers on a daily basis and score well in exams. Refer to the Transport in Plants Class 11 MCQs Questions with Answers here along with a detailed explanation.
Transport in Plants Class 11 MCQs Questions with Answers
Question 1.
Root hairs absorb water from soil with the help of
(a) Root pressure
(b) Osmotic pressure
(c) Suction pressure
(d) Turger pressure
Answer
Answer: (b) Osmotic pressure
Question 2.
The ingredient not used for preserving food stuff is
(a) Vinegar
(b) Salt and sugar
(c) Sugar and vinegar
(d) Ethanol
Answer
Answer: (d) Ethanol
Question 3.
Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
(a) Porins
(b) Pressure gradient
(c) Enzymes
(d) Flaccid
Answer
Answer: (a) Porins
Question 4.
Diffusion rate is affected by
(a) Pressure and soil
(b) Water and pressure
(c) Gradient concentration and pressure
(d) Soil and water
Answer
Answer: (c) Gradient concentration and pressure
Question 5.
What is the effect of turgor pressure in Munch hypothesis?
(a) Increase of turgor pressure
(b) Decrease of turgor pressure
(c) No change in turgor pressure
(d) Independent to water potential gradient
Answer
Answer: (a) Increase of turgor pressure
Question 6.
Munch hypothesis is based on
(a) Translocation of food due to turgor pressure gradient and imbibition force
(b) Translocation of organic solutes
(c) Translocation of food due to turgor pressure gradient
(d) Translocation of food due to imbibition force
Answer
Answer: (c) Translocation of food due to turgor pressure gradient
Question 7.
A and B are contiguous cells. A has OP = 10 atm and TP = 7atm, B has OP = 8atm, TP = 3 atm, DPD = 5 atm. The result would be
(a) No movement of water
(b) Equilibrium between the two
(c) Movement of water from B to A
(d) Movement of water from A to B
Answer
Answer: (d) Movement of water from A to B
Question 8.
Which of the following has highest water potential?
(a) 1 M sugar solution
(b) Distilled water
(c) 1 M salt solution
(d) 1 M sugar solution with 2-3 bar pressure
Answer
Answer: (b) Distilled water
Question 9.
Munch hypothesis is based on
(a) Translocation of food due to turgor pressure gradient and imbibition force
(b) Translocation of food due to turgor pressure gradient
(c) Translocation of food due to imbibition force
(d) None of the above
Answer
Answer: (b) Translocation of food due to turgor pressure gradient
Question 10.
ψp denotes to
(a) Water potential
(b) Negative potential
(c) Pressure potential
(d) Solute potential
Answer
Answer: (c) Pressure potential
Question 11.
Rate of transpiration is highest when
(a) Soil is dry and air is humid
(b) Soil is wet and air is dry
(c) Both soil and air are dry
(d) Soil is wet and air is humid
Answer
Answer: (b) Soil is wet and air is dry
Question 12.
The system of adjacent cell walls that is continuous throughout the plant is called as
(a) Symplast
(b) Apoplast
(c) Guttation
(d) Root pressure
Answer
Answer: (b) Apoplast
Question 13.
Rupture and fractionalization of water column present in treachery elements does not occur during ascent of sap due to
(a) Cohesion and adhesion
(b) Lignified thick walls
(c) Weak gravitational pull
(d) Transpirational pull
Answer
Answer: (a) Cohesion and adhesion
Question 14.
A concept fundamental to understanding water movement is called
(a) Pressure potential
(b) Water potential
(c) Solute potential
(d) Concentration gradient
Answer
Answer: (b) Water potential
Question 15.
The molecules which move from higher to lower regions are called as
(a) Imbibition
(b) Diffusion
(c) Osmosis
(d) Guttation
Answer
Answer: (b) Diffusion
Question 16.
Potometer works on the principle of
(a) Root pressure
(b) Amount of water absorbed equals to the amount transpired
(c) Osmotic pressure
(d) Potential difference between the tip of the tube and that of the plant
Answer
Answer: (b) Amount of water absorbed equals to the amount transpired
Question 17.
In plant cell, the cytoplasm of the adjacent cells are connected through bridges called
(a) Intercellular bridge
(b) Plasmodesmata
(c) Intracellular bridge
(d) Cell membrane
Answer
Answer: (b) Plasmodesmata
Question 18.
The component that is essential to perform all physiological activities of the plant is
(a) Pressure
(b) Water
(c) Temperature
(d) All of the above
Answer
Answer: (b) Water
Question 19.
The form of sugar transported through the phloem is
(a) Sucrose
(b) Fructose
(c) Ribose
(d) Glucose
Answer
Answer: (a) Sucrose
Question 20.
The excess water collected in the form of droplets around special openings of veins near tip of leaves is called as
(a) Guttation
(b) Transpiration
(c) Bleeding
(d) Oozation
Answer
Answer: (a) Guttation
Question 21.
Radial conduction of water takes place by
(a) phloem
(b) vessels
(c) vessels and tracheids
(d) ray parenchyma cells
Answer
Answer: (d) ray parenchyma cells
Question 22.
In plants, capillarity is aided by the small diameter of
(a) Trachery elements
(b) Cortical cells
(c) Parenchyma cells
(d) Phloem tissue
Answer
Answer: (a) Trachery elements
Question 23.
Transport of water and mineral in plants take place through
(a) Collenchymas tissues
(b) Phloem tissues
(c) Parenchyma
(d) Xylem tissues
Answer
Answer: (d) Xylem tissues
Question 24.
Water molecules are attracted to each other in the liquid phase more than to water in the gas phase
(a) Adhesion
(b) Surface tension
(c) cohesion
(d) capillarity
Answer
Answer: (b) Surface tension
Question 25.
The pathway of the movement of water through the cell wall only is called
(a) Symplast pathway
(b) Vacuolar pathway
(c) Plasmodesmata pathway
(d) Apoplast pathway
Answer
Answer: (d) Apoplast pathway
Question 26.
Select the correct equation from the following
(a) DPD = WP – OP
(b) DPD = WP + OP
(c) DPD = OP + WP
(d) DPD = OP – WP
Answer
Answer: (d) DPD = OP – WP
Question 27.
Stomata close down if relative humidity of atmosphere falls below
(a) 50%
(b) 70%
(c) 80%
(d) 60%
Answer
Answer: (a) 50%
Question 28.
Transport over longer distances proceeds through the vascular system
(a) Osmosis
(b) Translocation
(c) Transpiration
(d) Diffusion
Answer
Answer: (b) Translocation
Question 29.
Which one of the following will not directly affect transpiration?
(a) Temperature
(b) Chlorophyll content of leaves
(c) Wind speed
(d) Light
Answer
Answer: (b) Chlorophyll content of leaves
Question 30.
In wall of guard cell, cellulose microfibrils are arranged
(a) Transversely
(b) Tangently
(c) Radially
(d) Obliquely
Answer
Answer: (c) Radially
Question 31.
Cohesion-tension theory is related to
(a) Transpiration
(b) Respiration
(c) Ascent of sap
(d) Photosynthesis
Answer
Answer: (c) Ascent of sap
Question 32.
The rate of transpiration of a plant would gradually increase if
(a) Relative humidity decreases
(b) Relative humidity remains unchanged
(c) Relative humidity increases
(d) Water potential gradient remains unchanged
Answer
Answer: (a) Relative humidity decreases
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