Briefly explain about semantides, Biology

Assignment Help:

Q. Briefly explain about semantides?

The information carrying molecules in plants are called semantides, and they have been recognised to be 3 kinds; deoxyribonucleic acid or DNA (primary semantide), ribonucleic acid or RNA (secondary semantide) and proteins (tertiary semantide) following the sequential transfer of the genetic code. Of these, the proteins are the most favoured molecules for chemotaxonomic purposes. Plant proteins can be studied by different methods; by electrophoresis or by serological methods, and both processes have been used for obtaining information about the protein chemistry of different plants.

In the common bread wheat, Triticum aestivum, the storage proteins were analysed by. electrophoresis. For comparative purposes, the storage proteins of the- tetraploid wheat, Triticum dicoccum and the dipliod grass Aegilops Squarrosa were also analysed electrophoretically study confirmed the conclusion that the hexaploid wheat did contain a sum of the proteins possessed by the diploid species which have contributed to the evolution of the hexaploid wheat. This study supports the observations based
on morphology and cytological evidence

Serological analysis of proteins is based on the immunological reaction shown by mammals when a foreign protein is introduced into the system. In other words, this is based on the antibody-antigen reaction, the antibodies being specific to an antigen bringing about coagulation. This information can then be analysed to understand the relationships of the different plants on the basis of the serological evaluation of the plant proteins. Serology has proved a useful taxonomic tool at different levels of classification. J. G. Hawkes (1960) and his co-workers studied several tuber-producing species of Solanum to understand the evolution of the cultivated potato Solanum tuberosum and determine the species of Solanum which could be established as the ancestors of the common cultivated potato, Similarly, in the family Ranunculaceae, serological studies supported cytological data for the classification of the family into tribes and genera. Fair brothers (1959) and his CO-workers have studied several plant groups serologically particularly the members of grass family. A general conclusion from such studies is that the different amount of serological activity in members of, different plant families may be interpreted as a reflection of the evolutionary differences in the primary structure of the proteins due to which serological differences can be recognised between members of different families.


Related Discussions:- Briefly explain about semantides

What are the types of good in the demand curve, What are the types of good ...

What are the types of good in the demand curve? Some types of good are as follows: • Normal good: When incomes of consumers/households increase the quantity demanded wo

What will occur to the levels above of secondary consumers, In the short te...

In the short term what will occur to the levels above and below a population of secondary consumers of a numeric pyramid if a large number of individuals from this population dies?

Immunofluorescence test and its applications, Question 1 Discuss the Follo...

Question 1 Discuss the Following                    a) Immune response                    b) Immunofluorescence test and its applications Question 2 Answer the following ques

Explain the life cycle of nitrogen, Explain the life cycle of Nitrogen ? ...

Explain the life cycle of Nitrogen ? Nitrogen cycle: Along with carbon, hydrogen, and oxygen, nitrogen is one of the most common elements that form biological molecules. Nitr

What are the technique of operation cardiovascular surgery, What are the Te...

What are the Technique of Operation Cardiovascular Surgery? Technique of Operation Cardiovascular Surgery :  The operation is done on cardiopulmonary bypass with profound h

Class Gastropoda, Class Gastropoda Body asymmetrical, depicts torsion ...

Class Gastropoda Body asymmetrical, depicts torsion or its effects; shell coiled in most, well developed head with radula, large flat foot, gills one or two or with pulmonary

Define criteria for assessment of pyridoxine status, Define Criteria for As...

Define Criteria for Assessment of Pyridoxine Status? Vitamin B 6 status is most appropriately evaluated by using a combination of indicators,  namely plasma PLP concentration,

What are the important organic molecules for living being, What are the mos...

What are the most important organic molecules for living beings? There are many kinds of organic molecules that are significant for the living beings. Especially vital are amin

Microbiology, 2. Vaccinations against various childhood diseases have contr...

2. Vaccinations against various childhood diseases have contributed to the entry of women, particularly mothers, into the fulltime workplace. a. Is this statement supported by data

Temperate deciduous forest - ecosystem, Temperate deciduous forest - Ecosys...

Temperate deciduous forest - Ecosystem The temperate forests are characterised by a moderate climate and broad-leafed deciduous trees, which shed their leaves in fall, are bar

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