Which of the following is a function of plasma membrane-Protect the cell from its surroundingselectively permeable to ions and organic moleculesregulates the movement of substances in and out of cells-All of the above-

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Biology

Function of Cell Membrane

Which of the ...

Question

Which of the following is a function of plasma membrane

Protect the cell from its surrounding

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selectively permeable to ions and organic molecules

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regulates the movement of substances in and out of cells.

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All of the above

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Solution

The correct option is D All of the above
The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

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Similar questions

Q. Mark the following statements 'true' or false. Rewrite the wrong ones correctly.
(a) All cells have nuclei.
(b) Chloroplasts are present in all plant cells.
(c) Animal cells usually do not have vacuoles.
(d) Animal and plant cells have cell membranes.
(e) Ribosomes are called 'suicide bags'.
(f) The cell wall is made of cellulose which is a living substance.
(g) The cell membrane is freely permeable to all substances.
(h) All living organisms are made up of cells.
(i) Structures present in the cell are called organs.
(j) Cell respiration takes place in mitochondria.

Which one of the following cell organelles is correctly matched with its function ?
(a) Ribosomes — Synthesis of proteins
(b) Mitochondria — Secretion of enzymes
(c) Plasma membrane — Freely permeable
(d) Centrosome — Carries genes

Q. Cell membrane or plasma membrane is described as a selectively permeable membrane. Which of the following statements justify the given fact?

Question 29
Select the odd one out

(a) The movement of water across a semi-permeable membrane is affected by the amount of substances dissolved in it.
(b) Membranes are made of organic molecules like proteins and lipids
(c) Molecules soluble in organic solvents can easily pass through the membrane.
(d) Plasma membranes contain chitin sugar in plants

Plasma membrane is the outermost protective layer in cells of all plants and animals.

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