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

State the functional domains in children, Functional Domains in Children ...

Functional Domains in Children There are three functional domains of particular interest in this age range: Attention, Memory, and Executive function. The

What is classic repair in ventricular aneurysm, Classic Repair (Linear repa...

Classic Repair (Linear repair) :  The operation is done under cardio pulmonary bypass, through median sternotomy. If additional CABG is required, conduit harvesting is done.

Difference between type ii and type i diabetes mellitus, Q. What is the dif...

Q. What is the difference between type II diabetes mellitus and type I diabetes mellitus? Type I diabetes also known as insulin-dependent diabetes (as this name is not adequate

Hybridoma, Hybridoma is the clone of plasmacytoma cells which secrete a mo...

Hybridoma is the clone of plasmacytoma cells which secrete a monoclonal antibody; commonly produced by the fusion of peripheral or splenic plasma cells taken from the immunized mo

Functions of the musculoskeletal system, Q. What are the functions of the m...

Q. What are the functions of the musculoskeletal system? The musculoskeletal system has the functions of protecting and supporting organs, maintenance of the body spatial confo

Symmetry, How we explain intenal organs when we talk about symmetry??Is the...

How we explain intenal organs when we talk about symmetry??Is there any animal that is completely symmetric even insid the body?

Determine the occurrence of folic acid, Occurrence of folic acid Folic...

Occurrence of folic acid Folic acid is an active principle widely  occurring in the animal and vegetable kingdom. Richest sources are liver, dark  green leafy vegetables, bean

Explain enfuvirtide, Explain Enfuvirtide Enfuvirtide is the first fusio...

Explain Enfuvirtide Enfuvirtide is the first fusion inhibitor approved by the FDA for treatment of HIV infection and is indicated for treatment-experienced patients with ongoin

Define the working of cyclomixer, Define the working of Cyclomixer? Thi...

Define the working of Cyclomixer? This is an electrical mixer used for mixing the contents of a test tube. The speed of the mixer can be adjusted to your requirement. This is a

Define starch retrogradation, Starch Retrogradation The starch paste or...

Starch Retrogradation The starch paste or solution obtained after the gelatinisation is not stable and generally produces a viscoelastic, firm  and rigid gel. Structural transf

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