PROKARYOTIC ORGANISMS
PROKARYOTES ➤ DEFINITION ; ★ PROKARYOTIC CELLS HAVE NO PROMINENT NUCLEUS AND MEMBRANE BOUND ORGANELLES . ➤ DERIVED FROM; ★ IT IS DERIVED FROM GREEK WORD PRO MEANS "BEFORE" AND KARYON MEANS "NUCLEUS" . ➤ GENETIC MATERIAL; ★ IN PROKARYOTIC CELLS THE GENETIC MATERIAL (DNA) IS WITHOUT ANY NUCLEAR MEMBRANE COVERING AND IS DIRECTLY SUBMERGED IN THE CYTOPLASM. ➤ PROKARYOTES; ★ ORGANISMS POSSESSING PROKARYOTIC CELLS CALLED PROKARYOTES. ➤ DIVISION OF CELLS; ★ IN PROKARYOTES MITOSES IS MISSING AND CELL DIVIDES BY BINARY FISSION. ➤ RIBOSOMES; ★ PROKARYOTIC CELLS HAVE SMALL SIZED RIBOSOMES "SEDIMENTS AT 70S" . ➤ DISTINCTIVE FEATURE OF PROKARYOTES; ★ PERHAPS THE MOST DISTINCTIVE FEATURE OF THE PROKARYOTIC CELL IS ITS "CELL WALL" ,COMPOSED OF POLYSACCHARIDE CHAINS BOUND BY COVALENTLY TO SHORTER CHAINS OF AMINO ACIDS FORMING ...

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