Tag: movement in and out of the cell

Quizzes (3) Questions (117)

Questions Related to movement in and out of the cell

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

Water is absorbed from outside solution only when it is 

  1. Isotonic

  2. Hypotonic

  3. Hypertonic

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is absorbed from outside solution only if the external medium is hypotonic because a hypotonic solution has more concentration of solvent molecules than the fluid inside the cell. So, solvent molecules move inside the cell from the region of higher concentration to the lower concentration by the process of endosmosis. The cell swells and increases in size.

So, the correct answer is option B.

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

Uniformly sweet taste of tea or coffee is due to 

  1. Spreading

  2. Osmosis

  3. Permeablity

  4. Diffusion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While preparing coffee or tea we pour coffee or tea powder at one point but it is uniformly sweet. It is due to diffusion of the solvent from the high concentration to lower concentration and it becomes uniformly sweet taste.

There is no membrane it is not the case of osmosis and permeability.
So, the correct answer is 'DIffusion'.

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

State whether the following statements are true or false.
Cells placed in an isotonic environment will die as they swell and burst.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The movement of solutes from lower to higher concentration is called as osmosis. Isotonic solutions are those in which concentration of solute and solvent are same in the outside as well as inside of cells. When cells are placed in the isotonic solution they will remain unaffected as water movement in and out of the cells will be the same . while in hypotonic solution cells will absorb more water and thus become swollen and will burst eventually.

So, the correct statement is 'False'.

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

When a cell is placed in a hypotonic solution

  1. solute exits the cell to equalize the concentration on both sides of the membrane

  2. water exits the cell toward the area of lower solute concentration

  3. water enters the cell toward the area of higher solute concentration

  4. solute exits and water enters the cell
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hypotonic solution is a solution having lower osmotic pressure i.e; having less solute and more water than other solutions. When a cell is placed in hypotonic solution water enters towards the higher concentration i.e., from cell to surrounding as the cell is hypertonic.

So, the correct option is 'Water exits the cell toward the area of lower higher concentration'.

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

Polychlorinated bipheyls are stable, insoluble in water and soluble in

  1. Water

  2. Oil

  3. acids

  4. Chemicals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

PCBs are very stable mixtures that are resistant to extreme temperature and pressure. In general, PCBs are relatively insoluble in water, and the solubility decreases with increased chlorination. PCBs are also freely soluble in nonpolar organic solvents and biological lipids. They have high solubilities in most organic solvents, oils, and fats. 

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

When a plant cell is placed in a hypertonic solution it becomes plasmolysed. What shall be present between cell wall and plasmalemma at this stage?

  1. Water and air

  2. Cell sap

  3. Hypertonic solution

  4. Solutes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plant cells are surrounded by a dead cellulosic cell wall. The plant cell wall is fully permeable and cannot regulate the entry or exit of solutes or solvent. When a plant cell is present in a hypertonic solution plant cell will lose water through exosmosis. As the plant cell keeps on losing water, the protoplasm shrinks and moves away from the cell wall, the hypertonic solution moves inside the space between cell protoplasm and cell wall. 

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

If the solute concentration is higher in the external solution, then the solution is called as

  1. Hypotonic

  2. Isotonic

  3. Hypertonic

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the solute concentration is higher in the external solution than the cell kept in it, then the solution is called as hypertonic. When a cell is kept in hypertonic solution then the cell shrinks, as water comes out of the cell.

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

To initiate cell plasmolysis, the salt concentration outside the cell must be

  1. Isotonic

  2. Hypotonic

  3. Hypertonic

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cells are plasmolysed (plasmolysis has occurred) when the cell contents shrink and come out from the cell wall. 

If there is a higher concentration of dissolved salt outside of the cell (a hypertonic environment), then H$ _2$O will diffuse "out" from the cell and the cell will shrink and cellular metabolism will cease. This phenomenon is called as plasmolysis and it is the reason why foods can be preserved with high concentrations of salt and sugar.

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

Why does the skin of fingers shrink when washing clothes for a long time?

  1. Soap solution is of higher concentration (hypertonic)

  2. Water moves out of finger due to exosmosis

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Soap contains large amount of solutes. Soap is a hypertonic solution with high amounts of salts. Hence, when washing clothes solute concentration is more in soap water than in cells of hand. Due to this, exosmosis occurs in which the water molecules present in cells of hand move out in soap solution. This is an osmotic process in which the water molecules move from lower solute concentration to higher solute concentration, i.e., from dilute solutions to concentrated solution through a semi-permeable membrane. 

Multiple choice biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

Which of the following statement defines isotonic solutions?

  1. In which solution, the concentration of solvent and solutes is same as in the cytoplasm of the specific cell.

  2. In which solution, the concentration of solvent and solutes is higher as in the cytoplasm of the specific cell.

  3. In which solution, the concentration of solvent and solutes is lower as in the cytoplasm of the specific cell.

  4. In which solution, the concentration of solvent is higher and concentration of solutes is same as in the cytoplasm of the specific cell.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the isotonic solution, the concentration of solvent and solutes of the solution is same as in the cytoplasm of the specific cell. This state allows the free movement of molecules across the membrane without changing the concentration of solutes on either side. Thus, the correct answer is option A.