TRANSPORT IN PLANTS Q BANK

TRANSPORT IN PLANTS Q BANK Question and answer based on strictly latest NCERT based pattern, and previous year NEET (AIPMT) question. chapter wise approach mcq is more useful for quick revision and increase speed for maintaining time period.

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MCQ:-

Q1) Which of the following facilitates opening of stomatal aperture? (NEET 2017)

Contraction of outer wall of guard cells
Decrease in turgidity of guard cells
Radial orientation of cellulose microfibrils in the cell wall of guard cells
Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells


Answer- Radial orientation of cellulose microfibrils in the cell wall of guard cells



Q2) The water potential of pure water is (NEET 2017)

Zero
Less than zero
More than zero, but less than one
More than one


Answer- Zero


Q3) 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 out the above statements using the following options.  (NEET 2016, PHASE I)

Both processes can happen together because the diffusion coefficient of water & CO₂ is different
The above processes happen only during night time
One process occurs during day time & the other at night
Both processes cannot happen simultaneously


Answer- Both processes can happen together because the diffusion coefficient of water & CO₂ is different


Q4) A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap? (NEET 2016, PHASE II)

Acidic
Alkaline
Low refractive index
The absence of sugar


Answer- Alkaline


Q5) Root pressure develops due to  (CBSE AIPMT 2015)

Active absorption
Low osmotic potential in soil
Passive absorption
Increase in transpiration


Answer- Active absorption


Q6) A column of water within xylem vessels of tall trees does not break under its weight because of  (CBSE AIPMT 2015)

Dissolved sugars in water
Tensile strength of water
Iignification of xylem vessels
Positive not pressure


Answer- Tensile strength of water


Q7) Which of the following criteria does not pertain to facilitated transport?  (NEET 2013)

Requirement of special membrane proteins
High selectivity
Transport saturation
Uphill transport


Answer- Uphil transport


Q8) In land plants, the guard cells differ from other epidermal cells in having  (CBSE AIPMT 2011)

Mitochondria
Endoplasmic reticulum
Chloroplasts
Cytoskeleton


Answer- chloroplasts


Q9) Guard cells help in  (CBSE AIPMT 2009)

Protection against grazing
Transpiration
Guttation
Fighting against infection


Answer- Transpiration


Q10) The rupture & fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of  (CBSE AIPMT 2008)

Ignified thick walls
Cohesion & adhesion
Weak gravitational pull
Transpiration pull


Answer- Coheson & adhesion


Q11) Two cells A & B are contiguous. Cell A has osmotic pressure 10atm, turgor pressure 7atm & diffusion pressure deficit 3atm. Cell B has osmotic pressure 8atm, turgor pressure 3atm & diffusion pressure deficit 5atm. The result will be (CBSE AIPMT 2007)

Movement of water from cell B-A
No movement of water
Equilibrium between the two
Movement of water from cell A-B


Answer- Movement of water from cell A-B

Q12) The translocation of organic solutes in sieve tube members is supported by (CBSE AIPMT 2006)

P-proteins
Mass flow involving a carrier & ATP
Cytoplasmic streaming
Root pressure & transpiration pull


Answer- Mass flow involving a carrier & ATP


Q13) Stomata of a plant open due to  (CBSE AIPMT 2003)

Influx of hydrogen ions
Influx of calcium ions
Influs of potassium ions
Efflux of potassium ions


Answer- Influx of potassium ions


Q14) Stomata of CAM plants  (CBSE AIPMT 2003)

Open during the night & close during the day
Never open
Are always open
Open during the day & close at night


Answer- Open during the night & close during the day


Q15) Opening & closing of stomata is due to  (CBSE AIPMT 2002)

Hormonal change in guard cells
Change in turgor pressure of guard cells
Gaseous exchange
Respiration

Answer- Change in turgor pressure of guard cells



Q16) Glycolate induces opening of stomata in  (CBSE AIPMT 2001)

Presence of oxygen
Low CO₂ concentration
High CO₂ concentration
Absence of CO₂


Answer- Low CO₂ concentration


Q17) In which of the following plant sunken stomata are found?  (CBSE AIPMT 2001)

Nerium
Hydrilla
Mango
Guava


Answer- Nerium


Q18) Water enters a cell due to   (CBSE AIPMT 2001)

OP
SP
TP
WP


Answer- SP


Q19) In soil, water available for roots (to plants) is (CBSE AIPMT 1999,91)

Capillary water
Hygroscopic water
Gravitational water
Chemically bound water


Answer- Capillary water


Q20) The water potential & osmotic potential of pure water are  (CBSE AIPMT 1998)

100 & zero
Zero & zero
100 & 200
Zero & 100


Answer- zero & zero


Q21) If turgidity of a cell surrounded by water increases, the wall pressure will(CBSE AIPMT 1997)

Increase
Decrease
Fluctuate
Remain unchanged


Answer- Increase


Q22) Osmotic pressure in the leaf cells is positive during   (CBSE AIPMT 1997)

Excessive transpiration
Low transpiration
Excessive absorption
Guttation


Answer- Excessive transpiration


Q23) Water entering root due to diffusion is part of (CBSE AIPMT 1996)

Endosmosis
Osmosis
Passive absorption
Active absorption


Answer- Passive absorption


Q24) The movement of water from one cell of the cortex to the adjacent one in root is due to   (CBSE AIPMT 1995)

Accumulation of inorganic salts in the cell
Accumulation of organic compounds in the cell
Chemical potential gradient
Water potential gradient


Answer- Water potential gradient

Q25) Which of the following is used to determine the rate of transpiration in plants?  (CBSE AIPMT 1994)

Porometer
Potometer
Auxanometer
Tensiometer


Answer- Potometer


Q26) Some of the growth regulators affect stomatal opening. Closure of stomata is brought about by  (CBSE AIPMT 1994)

Indole butyric acid
Abscisic acid
Kinetin
Gibberelic acid


Answer- Abscisic acid


Q27) Which of the following is an effective adaptation for better gas exchange in plants?  (CBSE AIPMT 1993)

Presence of multiple epidermis
Presence of hair on the lower epidermis
Presence of waxy cuticle covering the epidermis of the leaves
The location of the stomata primarily on the lower surface of the leaf, the side turned away from the direct sun rays


Answer- The location of the stomata primarily on the lower surface of the leaf, the side turned away from the direct sun rays


Q28) The direction & rate of water movement from cell to cell is based on  (CBSE AIPMT 1992)

WP
TP
DPD
Incipient plasmolysis


Answer- DPD


Q29) Conversion of starch to organic acid is essential for  (CBSE AIPMT 1992)

Stomatal closure
Stomatal opening
Stomatal initiation
Stomatal growth


Answer- Stomatal opening


Q30) In guard cells when sugar is converted into starch the stomatal pore  (CBSE AIPMT 1992)

Opens fully
Opens partially
Closes completely
Remains unchanged


Answer- Closes completely


Q31) Meaningful girdling (ringing) experiment cannot be performed within sugarcane because  (CBSE AIPMT 1992)

Its phloem is situated interior to xylem
Its stem surface is covered with waxy coating
Its vascular bundles are not present in a ring
Its stem is thin


Answer- Its vascular bundles are not present in a ring


Q32) Guttation is caused by  (CBSE AIPMT 1992)

Transpiration
Osmosis/DPD
Root pressure
Osmotic pressure


Answer- Root pressure



Q33) An innovative professor who wanted to give a live demonstration of a physiological process, filled a glass bottle with previously moistened mustard seeds & water. He screwcapped the bottle & kept it away in a corner & resumed his lecture. Towards the end of his lecture there was a sudden explosion with glass pieces of bottle thrown around.
Which of the following phenomena did the professor want to demonstrate?   (CBSE AIPMT 1990)

Diffusion
Osmosis
Anaerobic respiration
Imbibition


Answer- Imbibition



Q34) Mainly condution of water in an angiosperm occurs through (CBSE AIPMT 1990)

Tracheids
Xylem vessels
Sieve tubes
All of these


Answer- Xylem vessels


Q35) Root system in a plant is well developed (CBSE AIPMT 1990)

Due to deficiency of auxins
Due to deficiency of cytokinins
Due to deficiency of minerals
For increased absorption of water


Answer- For increased absorption of water


Q36) In a terrestrial habitat which of the following is affected by temperature & rainfall condition?  (CBSE AIPMT 1989)

Translocation
Transpiration
Transformation
Thermodenaturation


Answer- Transpiration


Q37) Basis of stomatal opening is  (CBSE AIPMT 1988)

Exosmosis
Endosmosis
Decrease in cell sap concentration
Plasmolysis of guard cells


Answer- Endosmosis


Q38) Stomata in angiosperms open & close due to  (CBSE AIPMT 1988)

Their genetic constitution
Effect of hormones
Change of turgor pressure in guard cells
Pressure of gases inside the leaves


Answer- Change of turgor pressure in guard cells


Q39) The spraying of phenyl mercuric acetate in leaves  (CBSE AIPMT 1988)

Increases transpiration
Reduces transpiration
Increases rate of photosynthesis
Causes guttation


Answer- Reduces transpiration