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

What is a monohybrid cross, A monohybrid cross: A.Determines the genetic ma...

A monohybrid cross: A.Determines the genetic makeup of an organism B.always involves homozygous alleles. C.always involves organisms that are heterozygous at all loci. D.Always inv

Define causes of iron deficiency anaemia, Define Causes of iron Deficiency ...

Define Causes of iron Deficiency Anaemia? Anaemia is a condition in which the blood cannot carry enough oxygen. This may be because there are fewer red blood cells than normal,

Excreation, the excretory waste products formed breakdown of protein

the excretory waste products formed breakdown of protein

Awareness for diabetes mellitus, Q. Awareness for diabetes mellitus? Aw...

Q. Awareness for diabetes mellitus? Awareness should be generated in the community to prevent the diabetes mellitus, since we know prevention is better then cure. Use behav

Programmes directed towards the common crop plants, Programmes directed tow...

Programmes directed towards the common crop plants These programmes can be directed towards incorporating the following traits among common crop plants. Non-photo

Determine the eukaryotic replication origins, Which of the following statem...

Which of the following statements is wrong regarding eukaryotic replication origins? A. More origins are licensed and initiated within embryonic cells than in adult cells. B

Ecology, In what manner is the ecosystem concept useful in the study of env...

In what manner is the ecosystem concept useful in the study of environment

Explain about pre-market approval application, Question 1: Show the pro...

Question 1: Show the procedures for filing a 510(k) application and a Pre-market approval application for medical devices in the USA. Show out the procedures for filing a

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