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Cell The Unit of Life — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYCell The Unit of Life5 Marks
Question
Structure and function are correlatable in living organisms. Can you justify this by taking plasma membrane as an example?
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Answer

This is true that structure and function are correlated in living organisms. Following aspects of structure and function of plasma membrane justify this fact.
  • Plasma membrane provides a boundary to the cell contents. This is made possible because of its ability to segregate the inside of the cell with the external environment.
  • Plasma membrane is a semi-permeable membrane. This attribute helps the plasma membrane to allow exchange of some selected materials between the cell and its external environment.
  • We know that plasma membrane is composed of a lipid bilayer which has proteinintersperse in a mosaic like pattern. The protein molecules serve as channels for those substances which need active transport mechanism to enter or exit a cell.
  • The fluid layer of lipid allows those molecules to pass through the membrane which can easily travel through osmosis.

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