robert hook

shildan & swan

robert hook discovered cell in england in 1665

It was discovered by Robert Hook in 1665.

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Nandini
MUMBAI

IT ACTS AS A SEMIPERMAEABLE MEMBRANE ALLOWING ONLY 
SELECTIVE SUBSTANCES TO ENTER INTO THE CELL

selectively permeable means it is permeable for solvant but 
at that time some solute is also be passed.

Human erythrocyte(RBC)acetylcholinesterase is found to be 
an amphipathic protein in which the proteases could cleave 
the hydrophobic domain from an enzymatically active 
hydrophilic domain.

DNA is a deoxyribonucleic acid,a heriditery unit of any 
living being.DNA Mde up of a sugar ,a base and 
phophate.base i.e. 2 - purine & pyrimedine.

Deoxy ribo nuclic acid

DNA is a ribo nucliece acid first time na wasisolated from 
nuclie puss cells by friederch miescher in 1869

DNA is deoxy ribo nucluic acid which is contains the genetic
information for a living organism which replicates during
cell division and passes and the genetic information
transfers. It is responsible for transcription of RNA from
which proteins are translated from RNA and used for metabolism.

trypsin is an enzyme that breaks down the milk protein caesin, standard 
schoolboy experiment to measure rates of reaction

osmotic gradient separated by semipermeable membranesemi

DIFFUSION  is where the particles spread out to form and 
equal distribution of atoms in a solution e.g. ink in water 
but osmosis is basically the same exept through a semi 
permeable membrane and only the water molecules move
OSMOSIS is where you have two chambers where two different 
fluids are allowed to blend back and forth equally until 
evenly distributed through some sort of filter.
Diffusion is where a small amount of fluid is gradually 
allowed to pass into another

Lysosomes:  The bomb that goes off when self destruct signals are switched on, 
rupturing the cell membraneand causing apoptosis, suicide.

Golgi apparatus:  The general purpose assembly plant for molecules in the cell

Lysosomes:  The bomb that goes off when self destruct signals are switched on, 
rupturing the cell membraneand causing apoptosis, suicide.

Golgi apparatus:  The general purpose assembly plant and final touch artisans 
for molecules in the cell

Ribosomes:  The place where the amino acid bricks are stuck together in long 
chains ready to be folded up elsewhere.

Mitochondria:  The power plants of the cell

Oxidative phosphorylation is a metabolic pathway that uses 
energy released by the oxidation of nutrients to produce 
adenosine triphosphate (ATP

bacteria is a prokaryotic organism.generally prokaryotes 
contains cellwall as a protecting boundary.it protects 
bactreria from pH condition.and for some bacterias it helps 
as a barrier for causing some diseases

A flagellum (plural: flagella) is a long, slender 
projection from the cell body, composed of microtubules and 
surrounded by the plasma membrane. In small, single-cell 
organisms they may function to propel the cell by beating 
in a whip-like motion; in larger animals, they often serve 
to move fluids along mucous membranes such as the lining of 
the trachea.

A cell wall is a fairly rigid layer surrounding a cell, 
located external to the cell membrane, that provides the 
cell with structural support, protection, and a filtering 
mechanism.

flegella is a locomotive function of cell  with the help of 
flegella a cell move  whereas cell wall is a protactive 
function of cell  .

Is a group of cells which are of same shape and formation.
Cells of tissue have their common or origin
Tissue can be classified into two groups.
(1)Meristematic
(2)Permanent

(1)Meristenatic  tissue:- Meristenatic tissue comprises
those cells which are in the state of division or which
retain their power of dividing . These cells are polygonal
or oval having thin and homogenous wall without any
intrecellular spaces

(2)Permanent tissues :- Those cells which have lost their
power of dividing comes under this group. These cells may be
living or dead, thick or thin walled. These cells may be

            Primary of Secondary
Primary permament tissue is divided into  (a)Simple and 
(b)Complex tissue

         Simple is that which is made up of one type of
cells forming homogenous mass while complex is made of more
than one type of cells working together as a unit