Engineering Questions with Answers - Multiple Choice Questions

MCQs on Plant Water Relationship

1 - Question

Cohesion of water molecules is due to___________
a) Diffusion
b) Osmosis
c) Gravitational force
d) Surface tension

View Answer

Answer: d
Explanation: Cohesion is the property of water molecules which shows its hydrogen bonding. Surface tension is the phenomenon of holding together of water molecules.




2 - Question

Which of the following is NOT the property of water?
a) Nonpolar molecule
b) Excellent solvent
c) High heat of vaporization
d) High specific heat

View Answer

Answer: a
Explanation: Water is a polar molecule which is electrically neutral. It has a partial positive charge on each hydrogen and partial negative charge on each oxygen.




3 - Question

Name the term which is given for the movement of water through a semipermeable membrane?
a) Diffusion
b) Osmosis
c) Tonicity
d) Transpiration

View Answer

Answer: b
Explanation: Osmosis is a specialized form of diffusion, which involves a passive movement of water from higher to lower concentration of water with the help of a semipermeable membrane.




4 - Question

What is the measure of the osmotic pressure gradient of solutions separated by a semipermeable membrane?
a) Water potential
b) Ficks law
c) Turgor pressure
d) Tonicity

View Answer

Answer: d
Explanation: Osmotic pressure gradient of two solutions is measured by tonicity. There are three different types of tonicity which a solution can have with respect to other solution: isotonic, hypotonic, and hypertonic.




5 - Question

The pressure which exerts outward from the cell wall is known as turgor pressure?
a) True
b) False

View Answer

Answer: a
Explanation: Turgor pressure is the pressure exerted by the cell wall outwardly by expanding the protoplast.




6 - Question

Name the condition in which protoplast of the plant cell shrinks away.
a) Turgid
b) Plasmolysis
c) Flaccid
d) Rigid

View Answer

Answer: b
Explanation: Plamolysis is the condition of the cell which causes the shrinkage of protoplast, when the cell is placed in the hypertonic solution i.e., water moves out of the cell.




7 - Question

Which of the following type of solution has lower levels of solutes than the solution?
a) Isotonic
b) Hypertonic
c) Hypotonic
d) Anisotonic

View Answer

Answer: c
Explanation: Hypotonic is the condition of the cell where the solute level is higher as compared to the solution. Due to the hypotonic condition water moves inside the cell from the surrounding.




8 - Question

Which of the following is NOT the component of water potential?
a) Osmotic potential
b) Pressure potential
c) Gravitational potential
d) Assimilation potential

View Answer

Answer: d
Explanation: Water potential is the combination or sum of four component potential, i.e., gravitational potential, pressure potential, osmotic potential, and matric potential.

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