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

Prevention of malaria, Prevention of malaria No drug for malaria preven...

Prevention of malaria No drug for malaria prevention is 100% effective. Travelers to countries that have malaria should seek prompt medical attention for febrile illness wherea

Ventricular contraction, The mitral valve has an anterior and a posterior c...

The mitral valve has an anterior and a posterior cusp. The anterior cusp is larger and is attached on the upper right part of the margin of the left AV orifice. The posterior cusp

In which parts of the circulatory system are there valves, In which parts o...

In which parts of the circulatory system are there valves? There are valves in the heart (between each atrium and ventricle, in the aorta and pulmonary artery), in some of the

Definition of infective endocarditis, Infective endocarditis (IE) is a micr...

Infective endocarditis (IE) is a microbial infection of the endothelial surface of the heart. The characteristic lesion, the vegetation, is a variably sized amorphous mass of plate

Maternity and child health & family planning, M A TERNIT Y AND CHILD HEA...

M A TERNIT Y AND CHILD HEALTH & FAMILY PLANNING - 1.       The health centers give necessary information, guidance & assistance to mother before & after delivery pregnant wo

Hazards in biology laboratory, The major hazards encountered in the biologi...

The major hazards encountered in the biological lab work are diseases like infections and allergies which are caused by handling live animals. dissections, plant and animal tissues

Gas transportation systems in animals, Q. Oxygen comes from the environment...

Q. Oxygen comes from the environment and carbon dioxide in the end returns to the environment. How do small animals solve the problem of taking away and bringing these molecules fr

The human foetus expelled from the uterus of its mother, How is the human f...

How is the human foetus expelled from the uterus of its mother: The total time required for the embryonic and foetal development is called gestation period which is usually

Spoilage of pasteurized milk, Q. Explain Spoilage of pasteurized milk? ...

Q. Explain Spoilage of pasteurized milk? You would recall that pasteurization is one of the techniques to control and destroy the pathogenic, as well as, .spoilage bacteria i

Determine the membrane voltage of a sa node cell, Consider a time when the ...

Consider a time when the membrane voltage of a SA node cell in the heart is at its minimum value (near -80 mv).  At this time, A. all the voltage-gated calcium channels will be

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