What is rna, Biology

Assignment Help:

What is RNA?

RNA is a single-stranded molecule which has as its 5-carbon sugar ribose instead of the deoxyribose found in DNA. Also, uracil is substituted for thymine as a nitrogen base. RNA is built from a DNA template in a process called transcription. The RNA then delivers the coded specifications to the cytoplasm upon which protein molecules are built. While DNA does not synthesize proteins directly, the protein structure is ultimately determined by the DNA code.

The process of transcription is similar to DNA replication. An enzyme, RNA polymerase, binds to DNA and causes separation of the complementary strands. Next, complementary base-pairing occurs between the bases of the DNA strand and complementary RNA nucleotides floating in the nucleus. Only one of the DNA strands, the template strand, is transcribed. The complementary DNA strand is called the coding strand.

Transcription begins at specific segments called initiation sites, to which RNA polymerase attaches. RNA polymerase catalyzes the transcription of DNA in only one direction, on the 3' position of the molecule. RNA polymerase catalyzes sugar-to-phosphate bonds between the RNA nucleotides until it reaches the sequence of amino acids that serves as a termination signal, when the completed RNA molecule is released.

 


Related Discussions:- What is rna

Which statement is accurate, Which statement is correct? A. Synapomorphies ...

Which statement is correct? A. Synapomorphies identify monophyletic groups. B. A synapomorphy may arise due to covergent evolution. C. A synapomorphy is an ancestral trait. D. Syna

What is phosphorylation, What is phosphorylation? What are some biological ...

What is phosphorylation? What are some biological processes in which phosphorylation plays a critical role? Phosphorylation is the name given to processes of the addition of ph

Explain the preliminary treatment of implant therapy, Preliminary treatment...

Preliminary treatment of implant therapy It is important to ensure a healthy oral environment before going ahead with implant procedure. The treatment needs to be initiated in

Phylum porifera, harmful and beneficial usesa of phylum porifera

harmful and beneficial usesa of phylum porifera

What is hansen disease, What is Hansen's disease (etiological agent, mode o...

What is Hansen's disease (etiological agent, mode of transmission, clinical manifestations and prevention)? The etiological agent of Hansen's disease is bacteria known as Mycob

#fbiodiversitytitle.., Alimitation of five kingdom classification sk questi...

Alimitation of five kingdom classification sk question #Minimum 100 words accepted#

Chloroplasts, Chloroplasts are disk-like organelles with the double membra...

Chloroplasts are disk-like organelles with the double membrane found in the eukaryotic plant cells; contain thylakoids and are the site of photosynthesis. ATP is generated during

Reducing pollution - conservation of wildlife, Reducing Pollution - Conserv...

Reducing Pollution - Conservation of wildlife As you already know, pollution of various kinds has affected the survival of living beings, particularly the wildlife in various

Phylum, detail about phylum protozoa?

detail about phylum protozoa?

Embryos prom synergids, Embryos Prom Synergids The synergids, which u...

Embryos Prom Synergids The synergids, which usually degenerate prior to or soon after double fertilization, are reported to give rise to embryos in Argentine mexicana, Tamari

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