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

Hearing equilibrium, EQUILIBRIU M - Cristae and maculae are concerned ...

EQUILIBRIU M - Cristae and maculae are concerned with equilibrium. 1 .       DYNAMIC EQUILIBRIUM - Cristare detect turning or rotational movement of head ( angular ac

How to improve natural history with congenital heart disease, How to improv...

How to improve natural history of adults with congenital heart disease? Improving the natural history of adults with CHD: As mentioned above the populations of adults with CH

Soils of tropical and temperate forests, Soils of Tropical and Temperate Fo...

Soils of Tropical and Temperate Forests Although soils of tropical forests are generally poor in nutrients they are able to maintain high productivity under natural conditions

Prevention of coronary heart diseases, Q. Prevention of Coronary Heart Dise...

Q. Prevention of Coronary Heart Diseases? In view of the steep rise in the incidence of chronic degenerative coronary heart diseases, several programmes have been formulated to

Explain emtricitabine, Emtricitabine (FTC, Emtriva) Emtricitabine is th...

Emtricitabine (FTC, Emtriva) Emtricitabine is the 5-fluorinated derivative of lamivudine. It has same safetyand efficacy, and can be given once daily. It is available alone or

How is the human karyotype usually represented, Can two normal individuals ...

Can two normal individuals of the same species with sexual reproduction have identical genomes and identical karyotypes? How is the human karyotype usually represented? Except

Explain the heart rate monitoring (hrm) method, Explain the Heart Rate Moni...

Explain the Heart Rate Monitoring (HRM) Method? HRM is a method to measure the daily energy expenditure of free-living individuals, based on the relationship of heart rate and

Sample titration for estimation of vitamin c in lemon juice, Define Sample ...

Define Sample Titration for Estimation of Vitamin c in Lemon Juice? Cut the lemon into two halves with a stainless steel knife. Remove the seeds. Squeeze the juice from half a

Explain the nutritional and functional role of sulphur, Minerals :-  Sulfur...

Minerals :-  Sulfur Food Source       Widely distributed  Nutritional Functional role Essential nutrient: A constituent of the essential amino acids methionine and

Define body weight as a determinant of nutrient requirements, Define Body w...

Define Body weight as a determinant of nutrient requirements? Requirements are considered to be a function of body weight for individuals who are not overweight. However, for s

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