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 the most likely source of error in the study, In a cohort study tha...

In a cohort study that found an association between alcohol consumption and bladder cancer, 20,000 middle-aged men were asked about their drinking habits and then tracked for five

Phylum chordata, PHYLUM CHORDATA Definition and Introduction Bila...

PHYLUM CHORDATA Definition and Introduction Bilateral  and deuterostomial  eucoelomate eumetazoa, basically  possessing ,in  the embryo  or throughout life , a flexible,

List the five functions controlled by hypothalamus, List the five functions...

List the five functions controlled by hypothalamus. Hypothalamus controls many important functions which are as follows: a) Blood pressure control b) Hunger and thirst

Define the meaning of open kettles, Define the meaning of Open Kettles? ...

Define the meaning of Open Kettles? A number of foods can be satisfactorily concentrated in open kettles which are heated by steam. This is the case for jellies and jams, toma

Observation of hemichordata, Q. Observation of Hemichordata ? • identif...

Q. Observation of Hemichordata ? • identify Balanoglossus as a hemicliordate and give its scientific and common name. • classify Balanogiossus LIP to the level of order.

Nitrogen fixation, Nitrogen Fixation Nitrogen is an essential constitue...

Nitrogen Fixation Nitrogen is an essential constituent of living organisms and there is an inexhaustible supply of it in the atmosphere in the free form. Majority of living o

Define the concept of health - public nutrition, Define the Concept of Heal...

Define the Concept of Health - Public Nutrition? The most widely accepted definition of health is the one given by WHO (1948) in the preamble to its constitution, Box 1 gives t

Agama lizard, excretory system in agama lizard

excretory system in agama lizard

Reciprocal translocation and fusion, In chronic myelogenous leukemia, white...

In chronic myelogenous leukemia, white blood cells proliferate ceaselessly. In affected white blood cells, the BCR-ABL oncogene, the result of a gene fusion, transmits a constitu

What are allosteric enzymes, Allosteric enzymes are those that have more ac...

Allosteric enzymes are those that have more activation center and to which other substances known as allosteric regulators bind. Allosteric regulators can be allosteric inhibito

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