EASY
Earn 100

The process by which we can get fresh water from seawater is diffusion or desalination?

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Important Questions on Plasma Membrane

MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
What will happen if you keep grapes in a highly concentrated sugar solution?
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion

Define the following

Osmosis

 

MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion

In the formula, W2-W1W1 X 100, W1 represents

EASY
Science>Biology>Plasma Membrane>Osmosis and Diffusion

Give reason:

The phenomenon of osmosis cannot be demonstrated by using a boiled potato.

MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
How do substances like carbon dioxide and water move in and out of the cell?
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
A cell will swell up if
EASY
Science>Biology>Plasma Membrane>Osmosis and Diffusion

Name the process that has been taken place in the cell.

Question Image

EASY
Science>Biology>Plasma Membrane>Osmosis and Diffusion
What is osmosis?
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
 A cell will swell up if
EASY
Science>Biology>Plasma Membrane>Osmosis and Diffusion
A teacher placed an equal number of raisins in equal amount of water in two beakers A and B. Beaker A was placed at 20 °C while Beaker B was placed at 40 °C. After one hour in which beaker, the percentage of water absorbed by the raisins will be more? Give the reason for your observation.
 
EASY
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Absorption of water by plant roots is an example of
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Following are a few definitions of osmosis. Read carefully and select the correct definition.
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Following are a few definitions of osmosis. Read carefully and select the correct definition.
EASY
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Define diffusion.
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Mass of raisins before and after placing them in pure water for some time is 20 gm and 25 gm. Percentage of water absorbed by the raisins is
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Following are a few definitions of osmosis. Read carefully and select the correct definition.
HARD
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and answer the following:
(i) Explain why water gathers in the hollowed portion of B and C.
(ii) Why is potato A necessary for this experiment?
(iii) Explain why water does not gather in the hollowed-out portions of A and D.
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Swelling of raisins in pure water proves the process of
HARD
Science>Biology>Plasma Membrane>Osmosis and Diffusion
Explain why osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion:
(a) swelling up of a raisin on keeping in water
(b) spreading of virus on sneezing
(c) earthworm dying on coming in contact with common salt
(d) shrinking of grapes kept in thick sugar syrup
(e) preserving of pickles in salt
(f) spreading of smell of cake being baked in the kitchen
(g) aquatic animals using oxygen dissolved in water during respiration
MEDIUM
Science>Biology>Plasma Membrane>Osmosis and Diffusion
When some Rheo leaves are boiled in water for a few minutes and the killed cells are put in a strong salt solution after mounting. The cells will