4. Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution
into a more concentrated one. Can you pick out the option among the following which does not belong to this process
(a) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved int
b) Membranes are made of organic molecules such as proteins and lipids.
(c) Molecules soluble in organic solvents can easily pass through the membrane
(a) Plasma membranes contain chitin sugar in plants
Answers
Answer:
d is correct bcz Chitin can't paas through the semi permeable membrane
Answer:
(d) Plasma membranes contain chitin sugar in plants.
Explanation:
Osmosis
Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules through a partially permeable cell membrane.
Explanation for correct option:
Explanation for correct option:(d) Plasma membranes contain chitin sugar in plants.
Chitin is usually present in the cell wall of fungi and algae. The plasma membrane in plants is selectively permeable membrane which is made up of a lipid bilayer and proteins surrounding the cell but inside the cell wall. Semipermeable membrane is used for the process of osmosis.
Explanation for incorrect options:
Explanation for incorrect options:(a) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it.
The movement of water across a semi-permeable membrane is affected by the amount of substance which is dissolved in it. As water moves from higher concentration to lower concentration.
(b) Membranes are made of organic molecules such as proteins and lipids.
Membranes are mainly formed by proteins and lipids. The concentration of protein and lipids are different in different types of cells. Therefore, the concentration is not the same in all the cells.
(c) Molecules soluble in organic solvents can easily pass through the membrane.
Molecules dissolve in organic solvents and easily pass from the membrane as the membrane is dissolved in lipids and fats which is present in cells.
Therefore, option (d) is correct.
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