Miller experiment, Science

Assignment Help:

Miller's  Experiment

The above theory could be tested by  recreating  in  the laboratory on a small scale, the conditions which must have existed when life originated on the earth.  

 

2427_Millers  Experiment.png

Miller, an American biologist subjected a gaseous mixture of methane, ammonia, water vapour and hydrogen in a closed flask at 80°C  to electric sparking, foa week. This mixture, with its temperature, and electric discharge through it, represented a situation  that might have prevailed on the earth before  life came into existence. When the contents of  the flask were examined a week later, theywere found to have amino acids which are essential for the formation of  proteins. As we have said before, proteins are the essential building blocks for living organisms. With the making, in  the laboratory, of molecules related  to life, the credibility of  the Oparin-Haldane theory of chemical evolution greatly increased. Many amino acids have been obtained, since by this method. So also some sugars and nitrogenous bases which are otherwise found in the nucleus of  a cell, which is a unit of  living organisms. Similar experiments have led to the production of various compounds which form many kinds of  fats and important natural pigments. Miller's experiment  thus forms a turning point  in our approach to the problem of  the origin of  life. The evidence, we get from Miller's  experiment, is supported by evidence of  similar chemical reactions occurring in  space even today. Chemical analysis of a meteorite which fell near Murchi Murchison in Australia, in  1969, shqwed the presence of  organmolecules. The  types and relative proportions of  these molecules were very similar to the products  formed in Miller's  experiment. The presence of organic molecules like methane, ethane, formaldehyde, acetyle'ne etc. has been shown in interstellar space by radioastronomy also.  


Related Discussions:- Miller experiment

Hypothesis, Hypothesis: The next step is to formulate hypothesis. A  hy...

Hypothesis: The next step is to formulate hypothesis. A  hypothesis is a statement, put forward on the basis of reasoning, about the things that are being studied. It is an att

Define macrophages - csf, Define Macrophages - CSF It is produced by m...

Define Macrophages - CSF It is produced by macrophages, fibroblasts and endothelial cells. They specifically stimulate precursors of macrophages. It also enhances effector res

Tuning in on the stars, Tuning in on the Stars: The fact that stars e...

Tuning in on the Stars: The fact that stars emit radiowaves was discovered accidentally in  1932  by  a young engineer Karl Jansky. He was trying to find the source of  noise

Social science, discuss the importance of society and culture to existence ...

discuss the importance of society and culture to existence of man .

Objectives of fire hazards, Objectives After studying this unit you sho...

Objectives After studying this unit you should be able to: 1.  explain the significance of the fire triangle, 2.  list common causes of fire, 3.  describe the purpose

Explain the functions of mineralocorticoids, Explain the Functions of Miner...

Explain the Functions of Mineralocorticoids Aldosterone is the name given to the main physiological mineralocorticoid. As you go through the functions listed below, you will re

Water-mill in golden era, Water-mill in Golden era: The water-mills wer...

Water-mill in Golden era: The water-mills were also invented in  the classical period. But they came to be widely used only in  the Middle Ages. The wind-mills and water-mills

Chemical effects of air, CHEMICAL EFFECTS OF AIR Wash a small wad of st...

CHEMICAL EFFECTS OF AIR Wash a small wad of steel wool in gasoline, benzene or carbon tetrachloride (car- bona) to delete any grease. Squeeze it out and then fluff it. As soon

Electricity, why do we get shock when we touch an open wire?

why do we get shock when we touch an open wire?

Endomitosis, why and where endomitosis happen?

why and where endomitosis happen?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd