STRUCTURE AND FUNCTION OF CELL NUCLEUS

Written by Wednesday, 07 June 2017 22:29
In 1832 "Robert Brown" discovered nucleus. It is the essential part of the cell.   A definite nucleus is absent in prokaryotic cell. Instead of it a DNA molecules is…
In the cytoplasm of the cell complex membrane bounded system is present. It was called cytoplasmic vacuolar system by "Sacz & De robertis" in 1975. This system contains endoplasmic reticule,…
In the animal and plant cells clus­ters of fat filled structures are present. They are called Golgi apparatus or complex. In 1898 Camillo Golgi' recognised it in the nerve cell…

STRUCTURE AND FUNCTIONS OF LYSOSOMES

Written by Wednesday, 07 June 2017 11:35
Lysosome:   These are first ob­served in liver cells. They are 1.5 to 2 milii micron in size These are single mem­brane bounded structures. They were first called pericanalicular-dense bodies.…

STRUCTURE AND FUNCTION OF MITOCHONDRIA

Written by Wednesday, 07 June 2017 00:18
DEFINITION OF MITOCHONDRIA:   Mitochondria are center for cellular respiration. It converts chemical energy into kinetic energy.   Information About Mitochondria   In 1857 Kolliker observed mitochondria and called them…
The cytoplasm of the animal cell is bounded by a thin limiting membrane called "Cell membrane".   Nageli and Cramer called this membrane as cell membrane in 1855. In 1931…

AN ANIMAL CELL STRUCTURE

Written by Tuesday, 06 June 2017 22:14
Cell is a fundamental, structural and functional unit of living organism. The science which deals with cells and their organelles is called cell-biology. The term cell was first used by…
Feature Prokaryotic Cell Eukaryotic Cell 1. Nuclear envelope absent present 2. DNA single, circular and naked more than one and combined with proteins 3. Chromosome single multiple 4. Nucleolus absent…

BASIC STRUCTURE OF A PROKARYOTIC CELL

Written by Tuesday, 06 June 2017 00:08
The cells which lack true nuclear membrane are called prokaryotic cells. Blue green algae, bacteria are the examples for prokaryotic cells.   Prokaryotic cells lack chloroplasts mitochondria, Golgi complex and…
Cell Biology (Gr., kytos-hollow vessel or cell, logos-to discourse) is a biological science which deals with the study of cells. The cell itself can be regarded as the vital unit…
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