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Cell and its organelles

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Cell and its organelles

  1. 1. PROKARYOTIC CELL EUKARYOTIC CELL * Size is small (1-10 micrometre) * Size is large (5-100 micrometre) * Nucleus is absent and known as nucleoid. * Nucleus is present & with nuclear membrane. * Contains single chromosome. * Contains a number of chromosomes. * Cell division takes place by budding or fission. *Cell division takes place by mitosis or meiosis. ANIMAL CELL PLANT CELL * Generally small in size. * Generally larger than animal cell. * No cell wall is present. * Cell wall in addition to the plasma membrane. * Plastids are absent. Vacuoles are small. * Plastids are present. Vacuoles are large. * Nucleus is generally near the centre. * Nucleus is present near the periphery.
  2. 2. *CELL WALL *CELL MEMBRANE *NUCLEUS *GOLGI APPARATUS *LYSOSOMES *RIBOSOMES *MITOCHONDRIA *VACUOLES *PLASTIDS
  3. 3. It is a 2-layered envelope which is porous & semi-permeable . It is transparent, semifluid, colloidal ground substance in which chromatin are present. It is a darky stained, spherical structure. network of long, fine threads There are 4 components of nucleus :
  4. 4. • CELL IS THE STRUCTURAL AND FUNCTIONAL UNIT OF LIFE. • CELL WAS DISCOVERED BY ROBERT HOOKE IN 1665. • DIFFERENT CELL ORGANELLES ARE CELL MEMBRANE, CELL WALL, NUCLEUS, GOLGI APPARATUS, LYSOSOMES, RIBOSOMES, MITOCHONDRIA, PLASTIDS & VACUOLES. • NUCLEUS IS THE MOST CONSPICUOUS AND LARGEST ORGANELLE OF A CELL. • IT WAS DISCOVERED BY ROBERT BROWN IN 1831. • IT IS ALSO KNOWN AS DIRECTOR OF THE CELL AS IT CONTROLS ALL THE ACTIVITIES OF THE CELL • NUCLEUS IS FORMED OF 4 COMPONENTS : NUCLEAR MEMBRANE , NUCLEOPLASM, NUCLEOLUS, NUCLEAR CHROMATIN.

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