Self Studies
Self Studies
Self Studies
Self Studies

Transport in Plants Test - 69

Result Self Studies

Transport in Plants Test - 69
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Correct expression for water potential of plasmolysed cell will be
    Solution
    The measure of the relative tendency of water to move from one area to another is water potential.
    The expression in A is true for the plasmolyzed cell, which means osmotic potential equals water potential in the plasmolyzed cell. In the plasmolyzed cell, plant cell loses water, pressure potential lowers and water potential then becomes equal to osmotic potential.
    So, the correct option is $$\Psi_w = \Psi_s$$
  • Question 2
    1 / -0
    Density of vitreous humour is equal to the?
    Solution
    The gel-like fluid present in the eye between the lens and the retina is known as the vitreous humor. It has a density of 1.022 g/cm3 which is almost equivalent to that of water (1 g/cm3).
    So, the correct answer is 'Water'.
  • Question 3
    1 / -0
    Pickles, jams, jellies have low risk of spoilage as they cause.
    Solution
    In the process of making pickles, jams and jellies addition of more concentration of salt and sugar takes place. Because of the hypertonic nature of these items, the food spoiling organisms such as yeast, moulds cannot grow on them. When a cell placed in hypertonic solution, it undergoes plasmolysis. In the same manner, due to the high concentration of salt and sugar, they preserve for a long time.

     Hence, the correct answer is option C.
  • Question 4
    1 / -0
    Mark true statement about apoplast pathway.
    Solution
    Apoplast is the system of cell walls which is continuous throughout the plant except in some parts like Casparian strips in the roots. Therefore it cannot be aided by cytoplasmic streaming and cannot occur through plasmodesmata. So, the correct answer is 'apoplast pathway is faster than the symplast pathway'
  • Question 5
    1 / -0
    Which of the following is wrongly matched?
    Solution
    1. Plasmolysis occurs when water moves out of the cell and the cell membrane of a plant cell shrinks away from its cell wall. This occurs when a cell is placed in a hypertonic solution. 
    2. Transpiration is a process, in which the excess water is evaporated through stomata. The ascent of sap takes place by transpiration pull in plants. Roots actively transport ions through water and increase the pressure inside xylem, this pressure pushing up water to small heights.
    3. Excess water collects in the form of droplets by root pressure such as water loss in the liquid phase is called guttation.
    4. Phloem tissue is composed of sieve tube cells. As hydrostatic pressure in the phloem sieve tube increases, pressure flow begins, and sap moves through the phloem. 

    Hence, the correct answer is option A.
  • Question 6
    1 / -0
    Root pressure is generally not found in 
  • Question 7
    1 / -0
    Water movement against gravity is caused by?
    Solution
    Water movement against gravity is caused by transpiration. Transpiration is the process by which water is carried through plant roots to small pores of the leaves, where it changes to vapor and is released to the atmosphere. The mechanism of transport of water against gravity is by cohesive forces of water molecules. Water molecules cohere and are pulled up the plant by the tension, exerted by evaporation at the leaf surface. 

    Thus, the correct answer is option B.
  • Question 8
    1 / -0
    For a solution at atmospheric pressure kept in a beaker:-
    Solution
    Water potential is the pressure developed due to the movement of water molecules. This may create hydrostatic pressure in the cells which may be positive or negative and create tension or turgor pressure in the cell. When the solution is kept at atmospheric pressure, there is no change in the hydrostatic pressure thus pressure potential (Pressure on the wall due to turgor pressure) will be equal to zero. Hence, the water potential will be equal to the solute potential (osmotic potential due to solute concentration) as there is no movement of water outside the cell.
    So, the correct option is 'Ψ$$_w$$ = Ψ$$_s$$'.
  • Question 9
    1 / -0
    If a plant cell is placed in deionised water, the water potential of that cell becomes ___________________________.
    Solution
    If a plant cell is placed in deionised water will enter the cell and the cell will burst, the water potential also becomes negative.
    So, the correct option is 'More negative because pressure potential becomes more negative'
  • Question 10
    1 / -0
    The most important forces for the ascent of sap in plants are?
    Solution
    • The process by which water and minerals translocate from base to apex of the plant is known as the ascent of sap. It takes place through complex tissue xylem. Most important forces for the ascent of sap are; root pressure and capillary action.
    • Active transport of water takes place through xylem by a pressure called root pressure. It is responsible for pushing up water to small heights in the stem.
    • The tubes in the plant stem are very tiny and the movement of water through tiny tubes is called capillary action. This occurs when the adhesion is stronger than the cohesion. Water molecules are naturally attracted to each other. 


    Hence, the correct answer is option C.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now