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

Navigation and astronomy, Navigation and Astronomy: As we have said e...

Navigation and Astronomy: As we have said earlier, by  the edd of  the Middle Ages, trade on land and over the seas was being Sken up on a big scale. By  the fifteenth centur

The effect of soap on surface tension, The effect of soap on surface tensio...

The effect of soap on surface tension Select a large plate and rinse it unless you are sure that it is very clean. Fill the plate with cold water and let it stand for a time on

Experiment of simple hydraulic press, Simple hydraulic press The princi...

Simple hydraulic press The principle of the hydraulic press is illustrated by the following model. Half fill a cylindrical jar with water. Pour melted paraffin wax on the su

Explain the foetal monitoring, Explain the Foetal Monitoring During lat...

Explain the Foetal Monitoring During late pregnancy and during labour, a physician may want to monitor the foetal heart rate and other functions. Foetal heart rate monitoring i

Prtozoa, advantages and disadvantages of protozoa

advantages and disadvantages of protozoa

Cosmic distances, Cosmic Distances: If  we asked you what the distanc...

Cosmic Distances: If  we asked you what the distance between Delhi and Kanyakumari is, you would say that it  is roughly 3000 km. Another way of answering the question would

History, describe the factors which decide broad area of scientific activit...

describe the factors which decide broad area of scientific activity

Physico-chemical properties of pantothenic acid, Important physico-chemical...

Important physico-chemical properties of pantothenic acid are as follows: a) Pantothenic acid  is a pale yellow oily liquid that can only be crystallized as its sodium, potassi

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