How cells are studied, Biology

How cells are studied

We learnt about the evolution of the cell and a historical account of the growth of cell biology. In this section, you will study about the various tools and techniques used to study the cell.

Cells, due to their minute size, cannot be observed by the naked eye. Lenses can magnify minute objects only upto a limited extent. Therefore, many lenses were combined together to form an instrument known as the microscope (Gr mikros-small, skopein-to see). Subsequently, many new tools and techniques were invented by cell biologists about which you will study in detail in this section.

We begin the section with light microscope (LM). Here, you will know about the difference between resolving power and magnification and various cytochemical techniques which are used to study the chemical components and structural organisation of the cell. Phase contrast microscopy; an important technique for viewing the live cells is described. You will also learn about electron microscopy (EM), the best known method for the study of the ultrastructure of the cell and an important technique called 'freeze fracturing' which is used to study the internal structure of membrane in the cell.

Use of radioisotopes, antibodies, and fluorescence microscopy for localisation of various cell components are discussed in this Unit. You will also learn about cell culture and cinemicrography, the other important techniques used to study live cells. While going through this unit, it would be useful to recall and apply your knowledge of elementary chemistry, physics and mathematics, such as radioisotopes, refractive index and simple mathematical calculations. The study of this Unit assumes that you are familiar with the optical laws and princi~leso n which a microscope works.

Posted Date: 12/10/2012 12:25:38 AM | Location : United States







Related Discussions:- How cells are studied, Assignment Help, Ask Question on How cells are studied, Get Answer, Expert's Help, How cells are studied Discussions

Write discussion on How cells are studied
Your posts are moderated
Related Questions
Clinical symptoms of typhoid are: 1.  Graded fever which follows an upward  ladder pattern. 2.  Abdominal pain, cramps and diarrhoea. 3.  Anorexia and vomiting. 4.  In

Kingdom Monera The monerians are structurally the simplest of all living things. They have apparently changed little since they first appeared on the earth. Their structure is

Explain the Solubility in Water of dietary fibre? Fibres that dissolve in hot water are soluble and those that do not, are insoluble. Several structural features affect solubil

CHEMICA L COMPOSITION OF CHROMATIN Chromatin threads composed of DNA (31 %), RNA (2-5%) and proteins (Histon-36%, Non histon 28%). Histone and protamines are basic prote

HOW ARE THE ORIGIN AND EVOLUTION OF ALGAE..

Why TPP and TTP are vital for the nerves and cardiac tissues? TPP and TTP are interconvertible and arc involved in carbohydrate metabolism. As discussed above, when there is in

CHOROI D - Thin, net like made up of connective tissue, rich in blood vessels. Pigment present, red in rabbit, brown or black in man. It reduces internal reflection.

what is the mode nutrition exibited by tape worm?

Common Exercises You should know some of the common exercises which patient can do without help of a professional or going to a fitness club. Advise the patient to go for regul

Johne’s disease The disease, discovered by Heinrich A. Johne, a German bacteriologist and veterinarian, in 1905, is caused by a bacterium named Mycobacterium avium subspecies p