EASY
Earn 100

Define plasmolysis.

Important Questions on The Fundamental Unit of Life

EASY

Correct the following statements by changing the underlined words:

Xylem transports starch from the leaves to all parts of the plant body.

HARD
Which of the following elements is responsible for maintaining turgor in cells?
EASY
The solid linear cytoskeletal elements having a diameter of 7 nm and made up of a single type of monomer are known as:
MEDIUM

Differentiate between the following pairs on the basis of what is mentioned in the brackets:

Osmosis and Active Transport (Substances undergoing movement)

EASY

Give biological explanations for the following:

Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered

EASY

 Differentiate between the following pairs on the basis of what is indicated in the brackets.

Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them].

EASY
A biology teacher placed a hen’s egg in three different solutions:
 Solution A: Pure water,
 Solution B: saturated salt solution,
 Solution C: Hydrochloric acid
 The sequence of treatments and the ensuring probable effect on the egg are listed below:
 I. A - B - C -Remains unchanged
 II. B - C - A - Swells
 III. C - A - B - Shrinks
 IV. B - A - C - Loses salts
 Based on the above sequence to treatment which one of the options will be correct?
EASY

Correct the following statements by changing the underlined words:

The cell sap of root hair is Hypotonic.

MEDIUM

Assertion (A): Pea seeds swell more on imbibition than wheat seeds.

Reason (R): Proteins have a high imbibing capacity.

EASY
If wood is kept under water, then it becomes swell due to activity of
EASY

A solution of sucrose (molar mass=342) has been prepared by dissolving 68.4 g sucrose in 1 kg water.

Kf of H2O=1.86 K kg mol-1 and vapour pressure of water at 298 K is 0.024 atm.

The osmotic pressure of the solution at 298 K is

EASY
Absorption of water by gram is the process of
MEDIUM
Plasmolysis in a plant cell is defined as:
EASY
Wheat grains before germination absorb water by:
MEDIUM
A plant cell undergoes plasmolysis when placed in a salt solution. State the nature of the salt solution.
EASY
The initial stage of water absorption by root cells is by
MEDIUM

The leaves of a well-watered potted plant were found wilted during a hot sunny day.

What explanation should you suggest if the wilted leaves did not recover even during the night?

EASY
Choose the correct statement w.r.t. osmotic pressure.