Transport in Plants

These MCQs are about Transport in plants describing that plants have tissues to transport water, nutrients, and minerals. Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose and amino acids between the leaves and other parts of the plant.

Start Quiz

Which of the following is the unit of ψ?

Pascal Joule Newton Electron volt

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:

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

Which of the following is decreased during increase in humidity in the atmosphere?

Transpiration Photosynthesis Respiration Glycolysis

Plasmolysis occurs when the cell is placed in,

Hypertonic solution

Isotonic solution

Hypotonic solution

None of the above

The rate of transpiration in plants is dependent upon,

Light, temperature, atmospheric humidity and wind

Wind, temperature and light

Light and temperature

Temperature and soil

The water potential and osmotic potential of pure water are,

Zero and zero

100 and zero

100 and 100

None of these

Stomata open and close due to,

Turgor pressure of guard cells

Pressure of gases inside the leaves

Genetic clock

Ircadian rhythm

Movement of ions or molecules in a direction opposite to that of prevailing electrochemical gradient is known as,

Active transport

Brownian movement

Diffusion

PInocytosis

Ψs is always,

Positive

Zero

Negative

One

The contraction of the protoplast due to exosmosis when the cell is placed in hypertonic solution is called,

Deplasmolysis

Plasmolysis

Both (a) and (b)

None of these.

Guttation in plants is regulated by,

Humidity

Availability of water in soil

Temperature

AH of these.

Stomata open and close due to,

Turgor pressure of guard cells

Pressure of gases inside the leaves

Genetic clock

Ircadian rhythm

Positive pressure developed in tracheary elements of the root as a result of metabolic activities of the root of plant for pushing the water upwards through xylem into the shoot system is termed,

Diffusion pressure

Osmotic pressure

Turgor pressure

Root pressure.

If turgidity of a cell surrounded by water increases, the wall pressure will,

Decrease

Increase

Fluctuate

Remain unchanged.

In a fully turgid cell turgor pressure (T.P.) is equal to,

Osmotic pressure

Diffusion pressure deficit