Cell: The Unit of Life
Cell Membrane vs Cell Wall
Cell membrane har cell ke around ek patli, flexible layer hai; cell wall ek rigid outer layer hai jo sirf plants, fungi aur kuch microbes me hoti hai, animal cells me kabhi nahi.
Cell membrane
Har cell ke around lipids aur proteins ki patli, flexible layer. Ye control karti hai ki andar-bahar kya jaaye. Har cell me hoti hai, plant ho ya animal.
Cell wall
Membrane ke bahar ek rigid layer jo cell ko shape aur support deti hai. Plant cells, fungi aur kuch bacteria me hoti hai. Animal cells me nahi hoti.
Trap yeh hai
Students in dono ko mix kar dete hain, ya sochte hain animal cells me bhi wall hoti hai. Aisa nahi hai. Membrane patli hai aur transport control karti hai; wall rigid hai aur structure deti hai. Quick test: sirf plants, fungi aur kuch microbes me wall hoti hai, aur wo hamesha membrane ke bahar hoti hai.
Ye kahaan jud'ta hai
Wahi rigid wall wajah hai ki plant cell pure water me baith kar, phool kar bhi phatta nahi, jabki animal cell usi water me phat jaata hai. Wall wapas push karti hai. Yahi poori wajah hai ki plants firm aur seedhe rehte hain.
Ek quick check
Kaunsi structure plant cells me hoti hai par animal cells me NAHI?
- ACell membrane
- BCell wall
- CCytoplasm
- DNucleus