SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The cell membrane controls the nucleus. This is called selectively permeable.
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The cell membrane controls the ease with which substances pass into and out of the cell. This is called permeable.
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The cell membrane controls the ease with which substances pass into and out of the cell. This is called selectively permeable.
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The cell membrane controls the large organelles in the cell. This is called selectively permeable.
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The cell membrane controls something in the cell. This is called permeable.
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Detailed explanation-1: -The cell membrane is called selectively permeable as it only allows specific molecules to pass. Only specific molecules like water and gaseous molecules can pass through the cell membrane directly. It stops the flow of other molecules towards the two sides.
Detailed explanation-2: -The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.
Detailed explanation-3: -The selective permeability of biological membranes to small molecules allows the cell to control and maintain its internal composition. Only small uncharged molecules can diffuse freely through phospholipid bilayers (Figure 2.49).
Detailed explanation-4: -The cell membrane controls the movement of substances in and out of cells and organelles, being selectively permeable to ions and organic molecules.
Detailed explanation-5: -The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.