Transcription and processing of trna in prokaryotes , Biology

Assignment Help:

The rRNA transcription units in E. coli hold some tRNA genes which are processed and transcribed at the time of rRNA transcription. The other tRNA genes  happen  in  clusters  of  up  to  seven  tRNA  sequences  separated  by  spacer regions. Subsequent transcription by the one prokaryotic RNA polymerase, the

1515_22.png

                Figure:  Transcription and processing of tRNA in prokaryotes.

mainly  RNA  transcript  folds  up  into  the  characteristic  stem-loop  structures and is then processed in an ordered series of cleavages by ribonucleases (RNases)  that release and trim the tRNAs to their final lengths. The trimming  and cleavage reactions  at the 5'  and 3'  ends of the precursor  tRNAs  contained RNases D and E, F and P. RNases E, F and P are endonucleases  cutting the RNA within,  whilst  RNase  D is an trimming , exonuclease  the ends of the tRNA molecules.

 

 


Related Discussions:- Transcription and processing of trna in prokaryotes

#title.circulatory system, #question.what is the mechanism of circulatory s...

#question.what is the mechanism of circulatory system .

Give three examples of artificial selection, Give three examples of artific...

Give three examples of artificial selection. Include examples of both animals and plants.  Answers will vary, but could include domestic cats, domestic dogs, cattle, sheep, an

How does the embryo turn from gastrula into neurula, Q. How does the embryo...

Q. How does the embryo turn from gastrula into neurula? How is the neural tube formed? What is the embryonic origin of the nervous system in vertebrates? The neurula stage is c

How to prevent and control pem, How to Prevent and Control PEM? Any pr...

How to Prevent and Control PEM? Any programme aimed at prevention of PEM should be holistic and comprehensive considering the family as a unit. Since the effects of under nutr

Explain holding method of pasteurization, Explain holding method of pasteur...

Explain holding method of pasteurization In the holding method of pasteurization (62 o C for 30 minutes) or the high-temperature short-time (HTST), 71 o C for 15 minutes method

Define need of vitamin a during pregnancy period, Define Need of vitamin A ...

Define Need of vitamin A during pregnancy period? All four vitamins (A,C,E and K) have specific functions and a common role for all of them is to preserve the structural and fu

Amylase stock solution, Assume that you have 1 mL of a solution amylase (an...

Assume that you have 1 mL of a solution amylase (an enzyme) at a concentration of 15 mg protein/mL. Calculate the volume of diluting buffer that you would have to add to 1.0 mL of

Organization levels of life, Q. Define the Organization Levels of Life? ...

Q. Define the Organization Levels of Life? Ans. The cell is the basic unit of life - the smallest unit that can carry on all the processes of life. Organisms that consist of a

Physical weathering-weathering of rocks, Physical Weathering Mechanical...

Physical Weathering Mechanical forces acting upon the rocks cause physical weathering. Temperature fluctuations cause expansion and contraction of rock surface resulting in the

How many alleles of genes that condition x-linked traits do, How many allel...

How many alleles of genes that condition X-linked traits do female and male individuals respectively present? For every correspondent gene to an X- linked trait women present 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