Here, you will get Class 11 Biology MCQ of Chapter 11 Transport In Plants for cracking NEET/AIIMS. By solving these MCQs of Class 11 Biology Chapter 11 Transport In Plants, you will get the confidence to crack NEET. Practice MCQ Questions for Class 11 Biology with Answers on a daily basis and score well in exams.
Transport In Plants Class 11 MCQs Questions with Answers
Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be
(a) No movement of water
(b) Movement of water from cell B to A
(c) Movement of water from cell A to B
(d) Equilibrium between the two
Answer: (c) Movement of water from cell A to B
Which one of the following elements in plants is not remobilised?
(a) Calcium
(b) Potassium
(c) Sulphur
(d) Phosphorus
Answer: (a) Calcium
Ψs is always
(a) positive
(b) zero
(c) negative
(d) one
Answer: (c) negative
Cells shrink in _________ solution.
(a) isotonic
(b) hypotonic
(c) hypertonic
(d) hypotonic and hypertonic
Answer: (c) hypertonic
Water is lost in a liquid state in some plants through hydathodes. These hydathodes
(a) do not show any specificity in opening and closing
(b) remain closed during day
(c) remain closed at night
(d) remain always open
Answer: (d) remain always open
Choose the correct sequence of water movement in the plants
(a) Cortex, protoxylem, endodermis, root hair, pericycle, metaxylem
(b) Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem
(c) Root hair, protoxylem, metaxylem, pericycle, cortex, endodermis
(d) Root hair, pericycle, endodermis, cortex, protoxylem, metaxylem
Answer: (b) Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem
Cohesion-tension theory is related to
(a) Transpiration
(b) Respiration
(c) Ascent of sap
(d) Photosynthesis
Answer: (c) Ascent of sap
In wall of guard cell, cellulose microfibrils are arranged
(a) Transversely
(b) Tangently
(c) Radially
(d) Obliquely
Answer: (c) Radially
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: (b) Soil is wet and air is dry
Stomata close down if relative humidity of atmosphere falls below
(a) 50%
(b) 70%
(c) 80%
(d) 60%
Answer: (a) 50%
Two types of molecules cross the membrane in the same direction, it is called as
(a) Uniport
(b) Symport
(c) Antiport
(d) Multiport
Answer: (b) Symport
If pressure greater than atmospheric pressure is applied to pure water, the water potential
(a) increases
(b) decreases
(c) remains same
(d) atmospheric pressure does not affect water potential
Answer: (a) increases
Cohesion theory of water movement in plants was put forth by
(a) Henry Dixon
(b) F. F. Blackman
(c) Melvin cycle
(d) Hans. A. Krebs
Answer: (a) Henry Dixon
When a plant is girdled (ringed)
(a) the root and shoot die at the same time
(b) the shoot dies first
(c) the root dies first
(d) neither root nor shoot will die
Answer: (c) the root dies first
Choose the correct statement/statements. Pumps in active transport are
A. Lipids that bind molecules to pass them through the membrane.
B. Transport molecules uphill.
C. These are specific transporters.
D. These are sensitive to inhibitors.
(a) A and C
(b) A, B and D
(c) B, C and D
(d) C and D
Answer: (c) B, C and D
Assertion (A): K+ ion accumulation found in Nitella depends on its respiratory activity.
Reason (R): Absorption of all ions in plants completely depends on the usage of metabolic energy.
The correct answer is
(a) A and R are true and R is the correct explanation of A
(b) A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Answer: (c) A is true but R is false
Wilting of a plant results from excessive
(a) respiration
(b) photosynthesis
(c) absorption
(d) transpiration
Answer: (d) transpiration
Diffusion rate is affected by
(a) temperature
(b) membrane permeability
(c) gradient of concentration
(d) all of these
Answer: (d) all of these
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: (c) Translocation of food due to turgor pressure gradient
The water potential and osmotic potential of pure water are
(a) zero and zero
(b) 100 and zero
(c) 100 and 100
(d) None of these
Answer: (a) zero and zero
In a fully turgid cell turgor pressure (T.P.) is equal to
(a) Osmotic pressure
(b) Diffusion pressure deficit
(c) Wall pressure
(d) None of these
Answer: (a) Osmotic pressure
Water is lost in a liquid state in some plants through hydathodes. These hydathodes
(a) do not show any specificity in opening and closing
(b) remain closed during day
(c) remain closed at night
(d) remain always open
Answer: (d) remain always open
Which of the following is the unit of ψ?
(a) Pascal
(b) Joule
(c) Newton
(d) Electron volt
Answer: (a) Pascal
Dry seeds kept in water swell due to
(a) absorption
(b) diffusion
(c) imbibition
(d) none of these
Answer: (c) imbibition
In plants, capillarity is aided by the small diameter of
(a) Trachery elements
(b) Cortical cells
(c) Parenchyma cells
(d) Phloem tissue
Answer: (a) Trachery elements
Transport over longer distances proceeds through the vascular system
(a) Osmosis
(b) Translocation
(c) Transpiration
(d) Diffusion
Answer: (b) Translocation
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: (b) Apoplast
Guttation in plants is regulated by
(a) Humidity
(b) Availability of water in soil
(c) Temperature
(d) All of these
Answer: (d) All of these
Which one of the following process help the water- soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts?
(a) Leaching
(b) Fragmentation
(c) Catabolism
(d) None of these
Answer: (a) Leaching
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: (a) Cohesion and adhesion
A concept fundamental to understanding water movement is called
(a) Pressure potential
(b) Water potential
(c) Solute potential
(d) Concentration gradient
Answer: (b) Water potential
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: (b) Amount of water absorbed equals to the amount transpired
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: (b) Distilled water
Death of protoplasm is a pre-requisite for a vital function like
(a) transport of sap
(b) transport of food
(c) absorption of water
(d) gaseous exchange
Answer: (a) transport of sap
Root system in a plant is well developed
(a) due to deficiency of auxins
(b) due to deficiency of cytokinins
(c) due to deficiency of minerals
(d) for increased absorption of water
Answer: (d) for increased absorption of water
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