Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
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.
Explain the Functions of Stomach 1. Mechanical function: Muscular action of the stomach helps in the mixing of food with the digestive juices and also helps to propel the food
Explain the Dichromates or Mild Colour Blindness A dichromate individual possesses only two cone pigments. Lack of the red pigment, called protanopia, makes distinguishing of t
The effect of rain on sloping soil Fill a shallow pan or box with firmly packed soil. Set the pan outside in the rain with one end increased slightly. Observe how the raindrops
Explain the term Liming - Decreasing Soil Acidity Acid soils can be managed in two ways, viz. either by growing crops suitable for particular soil pH or by treating the soils w
What is full form of WHO ?
How did it change from Mendeleev to Mosely?
Explain the Functions of Inner Ear The inner ear plays an important function in the detection of sound. In the last section, we left middle ear function at the point where the
What are the benefits of organic matter Most of the benefits of organic matter are attributable to its favourable influence on soil structure and in turn on the volume of soil
Explain the Hyposecretion or Hypothyroidism in Adult Life Decreased secretion of thyroid hormone results in the development of myxoedema. There is a slowing of mental and physi
Observing changes of position of the earth with respect to the sun Mark a line on the floor or the wall where the sun shines in your room. Note the exact month, day and hour. A
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd