Class 9
Chapter 7 Class 9 - Diversity In Living Organisms
  • Prokaryotic cells of bacteria have an outer cell wall that surrounds the plasma membrane, which in turn surrounds a non-compartmentalised cytoplasm dotted with ribosomes.
  • They generally lack membrane-enclosed organelles such as nucleus,chloropasts and mitochondria.


  • A circular strand of DNA,usually coiled into one region of the cell, the nucleoid, serves as a single chromosome.
  • Metabolic activities , such as electron transport and photosynthesis, take place on the plasma membrane , which sometimes folds inwards into the cell’s interior.
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Maninder Singh's photo - Co-founder, Teachoo

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo