Steps of initiation , Biology

Assignment Help:

The entire mechanism of protein synthesis in eukaryotes is generally the same as in prokaryotes, with three phases explained as termination, elongation and initiation. Furthermore, there are some significant differences, mainly in during initiation.

?   Whereas a prokaryotic  ribosome  has a sedimentation  coefficient of 70S and subunits of 50S and 30S, a eukaryotic ribosome has a sedimentation  coefficient  of 80S  with  subunits  of 60S and  40S.  The composition of eukaryotic ribosomal subunits is also more difficult than prokaryotic subunits but the function of every subunit is essentially the similar as in prokaryotes.

?   In eukaryotes,  each mRNA is monocistronic  which is, discounting  any subsequent   post-translational  cleavage   reactions   which   should   happen  the  mRNA encodes  a one  protein.  In prokaryotes, various mRNAs are polycistronic which is they encode many proteins.  every coding sequence in a prokaryotic mRNA has its own termination and initiation codons.

? Starting of the protein synthesis in eukaryotes needs at least nine distinct eukaryotic initiation factors (eIFs) compared with the three initiation factors (IFs) in prokaryotes.

?   In the eukaryotes, initiating amino acid is methionine isnot N-formylmethionine as in prokaryotes.

 


Related Discussions:- Steps of initiation

Determine the dispersion of pollutants, Is the upward move of warm air good...

Is the upward move of warm air good or bad for the dispersion of pollutants? The upward movement of warm air is a natural method of dispersion of pollutants. The air near the g

Which is the autotrophic group responsible for production, Which is the aut...

Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth? Cyanobacteria and Algae of the phytoplankton are the organisms that

Digestive system, describe secretory function of salivary gland

describe secretory function of salivary gland

Define functions of selenium in humans, Define Functions of selenium in hum...

Define Functions of selenium in humans? Until recently, the only known metabolic role of selenium in humans was as a component of glutathione peroxidase which along with vitami

Explain canal obstruction - non-surgical endodontic, Explain Canal Obstruct...

Explain Canal Obstruction - Non-surgical Endodontic Retreatment     File work shorter than the normal apical and feel a great resistance to reach the true length a. A retain

Define about the carbohydrates, Define about the Carbohydrates? In the ...

Define about the Carbohydrates? In the previous unit, we came to know that availability of glucose is the major factor in exercise performance. Hence, carbohydrate manipulation

Fertilization - pre-embryonic development, Fertilization - Pre-Embryonic De...

Fertilization - Pre-Embryonic Development Ovulation generally takes place between 9th to 14th day after the end of last menstrual period. Fertilization of oocyte initiates dev

What do you mean by astigmatism and presbyopia, Q. What are astigmatism and...

Q. What are astigmatism and presbyopia? Presbyopia is the visual impairment in which there is loss of the cililary muscle strength thus reducing the ability of the crystalline

Pressure gradient, Pressure Gradient You know that air pressure is the ...

Pressure Gradient You know that air pressure is the weight of the atmosphere over a unit area of the earth's surface. The average air pressure at sea level is approximately 1 k

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