Why is the plasma membrane called a selectively permeable membrane?
(N/A) The plasma membrane is called a selectively permeable membrane because it selectively allows the movement of certain substances into and out of the cell. It permits the passage of specific molecules while preventing the movement of others,thereby maintaining the internal environment of the cell.
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View SolutionFill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.
< strong>Prokaryotic Cell < strong>Eukaryotic Cell $1.$ Size: generally small $(1-10 \,\mu m)$
$1 \,\mu m = 10^{-6} \,m$ $1.$ Size: generally large $(5-100 \,\mu m)$ $2.$ Nuclear region: ................... and ............... $2.$ Nuclear region: well defined and surrounded by a nuclear membrane $3.$ Chromosome: single $3.$ More than one chromosome $4.$ Membrane-bound cell organelles absent $4.$ .........................
| < strong>Prokaryotic Cell | < strong>Eukaryotic Cell |
| $1.$ Size: generally small $(1-10 \,\mu m)$ $1 \,\mu m = 10^{-6} \,m$ | $1.$ Size: generally large $(5-100 \,\mu m)$ |
| $2.$ Nuclear region: ................... and ............... | $2.$ Nuclear region: well defined and surrounded by a nuclear membrane |
| $3.$ Chromosome: single | $3.$ More than one chromosome |
| $4.$ Membrane-bound cell organelles absent | $4.$ ......................... |
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