MCQs For NCERT Class 11 Biology Chapter 11 Transport in Plants

Please refer to the MCQ Questions for Class 11 Biology Chapter 11 Transport in Plants with Answers. The following Transport in Plants Class 11 Biology MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 11. Our experts have designed MCQ Questions for Class 11 Biology with Answers for all chapters in your NCERT Class 11 Biology book.

Transport in Plants Class 11 MCQ Questions with Answers

See below Transport in Plants Class 11 Biology MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Which of the following is not a feature of active transport of solutes in plants ?       

(a) Occurs against concentration gradient
(b) Non-selective
(c) Occurs through membranes
(d) Requires ATP

Question. 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 tm and diffusion pressure deficit 5 atm. The result will be         
(a) no movement of water
(b) equilibrium between the two
(c) movement of water from cell A to B
(d) movement of water from cell B to A.

 Question. The water potential and osmotic potential of pure water are     
(a) 100 and 200
(b) zero and 100
(c) 100 and zero
(d) zero and zero.

Question. What will be the direction of flow of water when a plant cell is placed in a hypotonic solution ?   
(a) Water will flow in both directions.
(b) Water will flow out of the cell.
(c) Water will flow into the cell.
(d) No flow of water in any direction.

Question. The water potential of pure water is     
(a) less than zero
(b) more than zero but less than one
(c) more than one
(d) zero.

Question. When a cell is fully turgid, which of the following will be zero?   
(a) Turgor pressure
(b) Water potential
(c) Wall pressure
(d) Osmotic pressure

Question. With an increase in the turgidity of a cell, the wall pressure will     
(a) fluctuate
(b) remain unchanged
(c) increase
(d) decrease.

Question. Water movement between cells is due to     
(a) T.P.
(b) W.P.
(c) D.P.D.
(d) incipient plasmolysis.

Question. A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a corner. It blew up suddenly after about half an hour. The phenomenon nvolved is   
(a) diffusion
(b) imbibition
(c) osmosis
(d) DPD. 

Question. Water potential is equal to     
(a) Ψ_s + O.P
(b) Ψ_s = T.P
(c) Ψ_p + Ψ_w
(d) Ψ_s + Ψ_p.

Question. Root pressure develops due to     
(a) passive absorption
(b) active absorption
(c) increase in transpiration
(d) low osmotic potential in soil.

Question. In soil, water available for plants is   
(a) gravitational water
(b) chemically bound water
(c) capillary water
(d) hygroscopic water. 

Question. The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is   
(a) transpiration
(b) root pressure
(c) imbibition
(d) plasmolysis

Question. Xylem translocates     
(a) water, mineral salts, some organic nitrogen and hormones 
(b) water only
(c) water and mineral salts only
(d) water, mineral salts and some organic nitrogen only.

Question. The movement of water, from one cell of cortex to adjacent one in roots, is due to   
(a) accumulation of inorganic salts in the cells
(b) accumulation of organic compounds in the cells
(c) water potential gradient
(d) chemical potential gradient.

 Question. In soil, the water available for root absorption is   
(a) gravitational water
(b) capillary water
(c) hygroscopic water
(d) combined water 

Question. The principal pathway of water translocation in angiosperms is   
(a) sieve cells
(b) sieve tube elements
(c) xylem vessel system
(d) xylem and phloem

Question. Guttation is mainly due to   
(a) root pressure
(b) osmosis
(c) transpiration
(d) imbibition. 

Question. Stomatal movement is not affected by   
(a) temperature
(b) light
(c) O2 concentration
(d) CO2 concentration.

Question. Which of the following facilitates opening of stomatal aperture?   
(a) Decrease in turgidity of guard cells
(b) Radial orientation of cellulose microfibrils in the cell wall of guard cells
(c) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
(d) Contraction of outer wall of guard cells

Question. Transpiration and root pressure cause water to rise in plants by   
(a) pushing it upward
(b) pushing and pulling it, respectively
(c) pulling it upward
(d) pulling and pushing it, respectively.

Question. Which of the following criteria does not pertain to facilitated transport?   
(a) Transport saturation
(b) Uphill transport
(c) Requirement of special membrane proteins
(d) High selectivity 

Question. The movement of ions against the concentration gradient will be   
(a) active transport
(b) osmosis
(c) diffusion
(d) all of the above

Question. Which one gives the most valid and recent explanation for stomatal movement?     
(a) Starch hydrolysis
(b) Guard cell photosynthesis
(c) Transpiration
(d) Potassium influx and efflux 

Question. Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason ut the above statements using one of following options.       
(a) The above processes happen only during night time.
(b) One process occurs during day time and the other at night.
(c) Both processes cannot happen simultaneously.
(d) Both processes can happen together because the diffusion coefficient of water and CO₂ is different. 

Question. A column of water within xylem vessels of tall trees does not break under its weight because of     
(a) lignification of xylem vessels
(b) positive root pressure
(c) dissolved sugars in water
(d) tensile strength of water. 

Question. In land plants, the guard cells differ from other epidermal cells in having     
(a) cytoskeleton
(b) mitochondria
(c) endoplasmic reticulum
(d) chloroplasts. 

Question. Guttation is the result of   
(a) diffusion
(b) transpiration
(c) osmosis
(d) root pressure.

Question. Main function of lenticel is     
(a) transpiration
(b) guttation
(c) gaseous exchange
(d) bleeding. 

Question. Opening and closing of stomata is due to the     
(a) hormonal change in guard cells
(b) change in turgor pressure of guard cells
(c) gaseous exchange
(d) respiration.

Question. Guard cells help in     
(a) transpiration
(b) guttation
(c) fighting against infection
(d) protection against grazing. 

Question. The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of   
(a) weak gravitational pull
(b) transpiration pull
(c) lignified thick walls
(d) cohesion and adhesion

Question. Glycolate induces opening of stomata in
(a) presence of oxygen
(b) low CO₂ concentration
(c) high CO₂
(d) CO₂ absent. 

Question. In guard cells when sugar is converted into starch, the stomatal pore
(a) closes completely
(b) opens partially
(c) opens fully
(d) remains unchanged.

Question. Potometer works on the principle of
(a) osmotic pressure
(b) amount of water absorbed equals the amount transpired
(c) root pressure
(d) potential difference between the tip of the tube and that of the plant. 

Question. Stomata of a plant open due to
(a) influx of potassium ions
(b) efflux of potassium ions
(c) influx of hydrogen ions
(d) influx of calcium ions. 

Question. At constant temperature, the rate of transpiration will be higher at
(a) sea level
(b) 1 km below sea level
(c) 1 km above sea level
(d) 1.5 km above sea level. 

Question. Conversion of starch to organic acids is required for
(a) stomatal opening
(b) stomatal closing
(c) stomatal formation
(d) stomatal activity. 

Question. Phenyl mercuric acetate (PMA) results in
(a) reduced photosynthesis
(b) reduced transpiration
(c) reduced respiration
(d) killing of plants. 

Question. Transpiration is least in
(a) good soil moisture
(b) high wind velocity
(c) dry environment
(d) high atmospheric humidity.

Question. The most widely accepted theory for ascent of sap in trees is
(a) capillarity
(b) role of atmospheric pressure
(c) pulsating action of living cell
(d) transpiration pull and cohesion theory of Dixon and Jolly. 

Question. Stomata open and close due to
(a) circadian rhythm
(b) genetic clock
(c) pressure of gases inside the leaves
(d) turgor pressure of guard cells. 

Question. When water enters in roots due to diffusion, is termed as
(a) osmosis
(b) passive absorption
(c) endocytosis
(d) active absorption.

Question. In terrestrial habitats, temperature and rainfall conditions are influenced by
(a) water transformations
(b) transpiration
(c) thermoperiodism
(d) translocation.

Question. Which of the following is used to determine the rate of transpiration in plants?
(a) Porometer/Hygrometer
(b) Potometer
(c) Auxanometer
(d) Tensiometer/Barometer

Question. Poisons like cyanide inhibit Na⁺ efflux and K⁺ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that
(a) ATP is the carrier protein in the transport system
(b) energy for Na⁺-K⁺ exchange pump comes from ATP
(c) ATP is hydrolysed by ATPase to release energy
(d) Na⁺-K⁺ exchange pump operates in the cell.

Question. Minerals absorbed by root move to the leaf through
(a) xylem
(b) phloem
(c) sieve tubes
(d) none of the above

Question. What is the direction of movement of sugars in phloem?
(a) Bi-directional
(b) Non-multidirectional
(c) Upward
(d) Downward

Question. The translocation of organic solutes in sieve tube members is supported by
(a) cytoplasmic streaming
(b) root pressure and transpiration pull
(c) P-proteins
(d) mass flow involving a carrier and ATP. 

Question. Loading of phloem is related to
(a) increase of sugar in phloem
(b) elongation of phloem cell
(c) separation of phloem parenchyma
(d) strengthening of phloem fiber.