Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

41.

Potometer works on the principle of

  • amount of water absorbed equals the maount transpired

  • osmotic pressure

  • root pressure

  • potential difference between the tip of the tube and that of the plant


42.

Which one of the following does'nt help in molecule transport?

  • Diffusion

  • Osmosis

  • Surface tension

  • Active transport


43.

Potometer is used to measure

  • ascent of sap

  • root pressure

  • transpiration

  • photosynthesis


Advertisement

44.

The real forces responsible for the movement of water from one cell to another cell is mainly

  • Osmotic Pressure (OP)

  • Turgor Pressure (TP)

  • Diffusion Pressure Deficit (DPD)

  • imbibition


C.

Diffusion Pressure Deficit (DPD)

The net force with which water is drawn into a cell is equal to difference of OP and TP, known as diffusion pressure deficit or suction pressure. DPD of pure water is maximum (= 1236 atm) solvent moves from cell of low DPD to high DPD. DPD, or SP= OP-TP.


Advertisement
Advertisement
45.

The magnitude of root pressure ranges from

  • 2-5 atm

  • 0.1-0.2 atm

  • 1-5 atm

  • 4-6 atm


46.

Assertion: Translocation of sugar from source (leaf) to sink is defined as pressure flow hypothesis.

Reason: Translocation of the solute is facilitated through living phloem sieve tube cells.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


47.

A plasmolysed cell can be deplasmolysed by placing it in

  • isotonic solution

  • saturated solution

  • pure water or hypotonic solution

  • hypertonic solution


48.

Which one of the following is correct for the transmembrane proteins in lipid bilayer of plasma membrane?

  • They are absent in animal cells

  • They act as channel proteins

  • They are absent in plant cells

  • They are only externally located


Advertisement
49.

Na+/K+ pump is associated with

  • passive transport

  • active transport

  • osmosis

  • imbibition


50.

What is correct about the movement of substance across the membrane in facilitated diffusion?

  • It is an active transport

  • It doesn't cause transport of molecules from low concentration to high concentration

  • It is insensitive to inhibitors

  • It is a very specific transport


Advertisement