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

Phylem porifera, please give us this phylem''s example...

please give us this phylem''s example...

A patient was complaining of frequent urination, A patient was complaining ...

A patient was complaining of frequent urination, excessive thirst and dehydration. His fasting glucose level was found to be normal. Name the disease and its cause. Describe

Molecular biology and technology, what are protein? What is the constituent...

what are protein? What is the constituential uni. Of protein? Briefly explain the various forms of protein?

Giardia – flagellates, Giardia – Flagellates Giardia intestinalis inha...

Giardia – Flagellates Giardia intestinalis inhabits the intestine of man. It has the distinction of being probably the first parasitic protozoan to be seen by Antony Van Leeuw

Difference between spermatocyte ii and spermatocyte i, Q. What is the diffe...

Q. What is the difference between spermatocyte II and spermatocyte I? The spermatocyte I (2n) undergoes the first division of meiosis (meiosis I) originating two spermatocyte I

What do you mean by hemodialysis, Q. What do you mean by hemodialysis? ...

Q. What do you mean by hemodialysis? Hemodialysis is the artificial blood filtration made by specific machines in alternative of the kidneys. Hemodialysis may be necessary in p

Male reproductive disorders-testicular hypoplasia, Testicular Hypoplasia ...

Testicular Hypoplasia Hypoplasia refers to testicular disorders related to congenitally underdeveloped and underactive spermatic epithelium of one or both testes even though t

Properties of isozymes, Properties of Isozymes Isozymes differ from  ...

Properties of Isozymes Isozymes differ from  each other not only in  the amino acid composition, they also have different electrophoretic property, thermolability, immunologi

St depression at rest, Q. What is ST depression at rest? As early as 19...

Q. What is ST depression at rest? As early as 1965 Ostrand called attention to the syndrome of short PR interval without accelerated conduction and it's association with ST dep

protozoa, What is the taxonomy of protozoa

What is the taxonomy of protozoa?

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