NEET Biology Transport in Plants MCQs Set C

Question: Diffusion is a ______process and is not dependent on _______.

• a) Slow, living system
• b) Rapid, pressure
• c) Slow, gradient of concentration
• d) Rapid, temperature

Answer:  Slow, living system

Question: Diffusion rates are affected by

• a) All of these
• b) Concentration gradient
• c) Temperature
• d) Pressure

Answer: All of these

Question: Gaseous movement into and out of the plants occurs indirectly through

• a) Diffusion
• b) Transpiration
• c) Imbibition
• d) Osmosis

Answer: Diffusion

Question: Which of the following process requires membrane proteins?

• a) Facilitated diffusion
• b) Simple diffusion
• c) Imbibition
• d) More than one option is correct

Answer: Facilitated diffusion

Question: Select the incorrect statement w.r.t. facilitated diffusion

• a) Uphill transport
• b) Transport saturates
• c) Highly selective
• d) Requires special membrane proteins

Answer: Uphill transport

Question: A cell when immersed in a solution, increases in volume, so the external solution is

• a) Hypotonic
• b) Hypertonic
• c) Isotonic
• d) Either hypertonic or hypotonic

Answer: Hypotonic

Question:  A cell is placed in 0.4 M solution of sugar and no change in volume of cell is found. What is the concentration of the cell sap

• a) 0.4 M
• b) 0.20 M
• c) 4 M
• d) 40 M

Answer: 0.4 M

Question: Select the odd one out w.r.t. porins

• a) Found in outer membrane of gram positive bacteria
• b) Associated with the outer membrane of mitochondria
• c) Not associated with the inner membrane of plastids
• d) Allow movement of low molecular weight hydrophilic substances

Answer:  Found in outer membrane of gram positive bacteria

Question: In antiport,

• a) Two molecules are moved in opposite directions across the membrane
• b) Only one molecule is transported across the membrane
• c) Two molecules are transported in same direction across the membrane
• d) No transport occurs

Answer: Two molecules are moved in opposite directions across the membrane

Question: In active transport

• a) All of these
• b) Membrane proteins are involved
• c) Energy is required
• d) Pumps are present

Answer: All of these

Question: A plant cell if placed in distilled water will

• a) Swell up
• b) Burst immediately
• c) Shrink
• d) Not change its shape or size

Answer: Swell up

Question: Doors made up of wood, swell up in rainy season due to

• a) Imbibition
• b) Exosmosis
• c) Guttation
• d) Transpiration

Answer: Imbibition

Question: Select the incorrect statement w.r.t. imbibition

• a) Affinity between the adsorbent and the liquid is not a pre-requisite
• b) It is diffusion process
• c) It involves both capillary action and adsorption
• d) Phycocolloids are best imbibants

Answer: Affinity between the adsorbent and the liquid is not a pre-requisite

Question: Concentration of water molecules in a system determines

• a) Water potential of the system
• b) Uphill transport rate
• c) Number of carrier proteins
• d) Membrane permeability

Answer: Water potential of the system

Question: Osmotic potential is

• a) Negative
• b) Always zero
• c) Greater than one
• d) Positive

Answer: Negative

Question:  When solute potential increases then water potential would

• a) Increase
• b) Decrease
• c) First increase then decrease
• d) Remain same

Answer: Increase

Question: The hydrostatic pressure which develops due to entry of water into a plant cell is

• a) Positive
• b) Negative
• c) Zero
• d) Undetermined

Answer: Positive

Question:

• a)

  

• b)

  

• c) Zero
• d) TP

Answer:

Question: When a cell is placed in a solution whose osmotic concentration is equal to cell sap then

• a) No net movement of water occurs
• b) Water moves inside the cell
• c) Water moves outside the cell
• d) Cell will be plasmolysed

Answer: No net movement of water occurs

Question:

• a) 300, 400 kPa
• b) –300, –400 kPa
• c) –1100, –1600 kPa
• d) 900, 600 kPa

Answer: 300, 400 kPa

More Questions...........................

Question: Transpiration and root pressure cause water to rise in plants by

• a) Pulling and pushing it, respectively
• b) Pushing and pulling it, respectively
• c) Pulling it upward
• d) Pushing it upward

Answer: Pulling and pushing it, respectively

Question: In a ring girdled plant

• a) The root dies first
• b) Neither root nor shoot will die
• c) The shoot dies first
• d) The shoot and root die together

Answer: The root dies first

Question: Which one gives the most valid and recent explanation for stomatal movements?

• a) Potassium influx and efflux
• b) Transpiration
• c) Guard cell photosynthesis
• d) Starch hydrolysis

Answer: Potassium influx and efflux

Question: Which of the following criteria does not pertain to facilitated transport?

• a) Uphill transport
• b) Transport saturation
• c) High selectivity
• d) Requirement of special membrane proteins

Answer: Uphill transport

Question: Lenticels are involved in

• a) Gaseous exchange
• b) Food transport
• c) Photosynthesis
• d) Transpiration

Answer: Gaseous exchange

Question: Guttation is the result of

• a) Root pressure
• b) Diffusion
• c) Transpiration
• d) Osmosis

Answer: Root pressure

Question: Which one of the following structures between two adjacent cells is an effective transport pathway?

• a) Plasmodesmata
• b) Plasmalemma
• c) Plastoquinones
• d) Endoplasmic reticulum

Answer: Plasmodesmata

Question:  Given below is the diagram of a stomatal apparatus. In which of the following all the four parts labelled as A, B, C and D are correctly identified?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Guard cells help in

• a) Transpiration
• b) Fighting against infection
• c) Guttation
• d) Protection against grazingZX

Answer: Transpiration

Question:  The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of

• a) Cohesion and adhesion
• b) Transpiration pull
• c) Lignified thick walls
• d) Weak gravitational pull

Answer: Cohesion and adhesion

Question: Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure - 7atm 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) Movement of water of Cell A to B
• b) No movement of water
• c) Movement of water from Cell B to A
• d) Equilibrium between the two

Answer: Movement of water of Cell A to B

Question: The translocation of organic solutes in sieve tube members is supported by

• a) Mass flow involving a carrier and ATP
• b) Root pressure and transpiration pull
• c) P-proteins
• d) Cytoplasmic streaming

Answer: Mass flow involving a carrier and ATP

Question: Potometer works on the principle of

• a) Amount of water absorbed equals the amount transpired
• b) Osmotic pressure
• c) Root pressure
• d) Potential difference between the tip of the tube and that of the plant

Answer: Amount of water absorbed equals the amount transpired

Question: When water enters in roots due to diffusion, it is termed as

• a) Passive absorption
• b) Endocytosis
• c) Active absorption
• d) Osmosis

Answer: Passive absorption

Question: When water moves through a semipermeable membrane then which of the following pressure develops?

• a) Turgor pressure
• b) Wall pressure
• c) Suction pressure
• d) Osmotic pressure

Answer: Turgor pressure

Question: When a cell is fully turgid, which of the following will be zero?

• a) Water potential
• b) Wall pressure
• c) Osmotic pressure
• d) Turgor pressure

Answer: Water potential

Question: With an increase in the turgidity of a cell, the wall pressure will

• a) Increase
• b) Decrease
• c) Fluctuate
• d) Remain unchanged

Answer:  Increase

Question: The water potential and osmotic potential of pure water are

• a) Zero and zero
• b) 100 and zero
• c) Zero and 100
• d) 100 and 200

Answer: Zero and zero

Question: Stomatal opening is affected by

• a) Carbon dioxide concentration, temperature and light
• b) Nitrogen concentration, carbon dioxide concentration and light
• c) Nitrogen concentration, light and temperature
• d) Carbon dioxide concentration, nitrogen concentration and temperature

Answer: Carbon dioxide concentration, temperature and light

Question: Which of the following statements is not true for stomatal apparatus?

• a) Guard cells are always surrounded by subsidiary cells
• b) Guard cells invariably possess chloroplasts and mitochondria
• c) Inner walls of guard cells are thick
• d) Stomata are involved in gaseous exchange

Answer: Guard cells are always surrounded by subsidiary cells

Question:  Opening and closing of stomata is due to the

• a) Hormonal change in guard cells
• b) Gaseous exchange
• c) Respiration
• d) None of these

Answer: Hormonal change in guard cells

Question: Stomata of a plant open due to

• a) Influx of potassium ions
• b) Influx of hydrogen ions
• c) Eflux of potassium ions
• d) Influx of calcium ions

Answer: Influx of potassium ions

Question: Stomata of CAM plants

• a) Open during the night and close during the day
• b) Are always open
• c) Open during the day and close at night
• d) Never open

Answer: Open during the night and close during the day

Question: Potometer works on the principle of

• a) Amount of water absorbed equals the amount transpired
• b) Osmotic pressure
• c) Root pressure
• d) Potential difference between the tip of the tube and that of the plant

Answer:  Amount of water absorbed equals the amount transpired

Question: Glycolate induces opening of stomata in

• a) Low CO₂ concentration
• b) CO₂ absent
• c) High CO₂
• d) Presence of oxygen

Answer: Low CO₂ concentration

Question: Which of the following get accumulated in the vacuoles of guard cells during stomatal opening?

• a) Malate, potassium and chloride ions
• b) Starch, potassium and chloride ions
• c) Water, calcium and magnesium
• d) Malate, sodium and potassium ions

Answer: Malate, potassium and chloride ions

Question: The movement of water, from one cell of cortex to adjacent one in roots, is due to

• a) Water potential gradient
• b) Accumulation of organic compounds in the cells
• c) Accumulation of inorganic salts in the cells
• d) Matrix potential gradient

Answer: Water potential gradient

Question: Which of the following is the most accepted theory for movement of water through plants?

• a) Cohesion tension theory
• b) Imbibition theory
• c) Capillarity
• d) Root pressure

Answer: Cohesion tension theory

Question: The translocation of organic solutes in sieve tube members is supported by

• a) Mass flow involving a carrier and ATP
• b) Root pressure and transpiration pull
• c) Cytoplasmic streaming
• d) P-proteins

Answer: Mass flow involving a carrier and ATP

Question: Loading of phloem is related to

• a) Increase of sugar in phloem
• b) Separation of phloem parenchyma
• c) Elongation of phloem cell
• d) Strengthening of phloem fiber

Answer: Increase of sugar in phloem