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

Explain the occurrence of vitamin B6, Explain the Occurrence of vitamin B 6...

Explain the Occurrence of vitamin B 6 Vitamin B 6 activity is attributed to the 3 compounds-pyridoxol (pyridoxine), pyridoxal and pyridoxamine, generally comprised in the vit

Define development - terminologies used in chromatography, Define Developme...

Define Development - Terminologies used in Chromatography? Development is the process of passing a mobile phase over the adsorbent or support. During the development the sample

Explain hyperglycaemic, Hyperglycaemic:- In the fasting state, glucose ...

Hyperglycaemic:- In the fasting state, glucose release from the liver increases due to the action of glucagon and in the muscle by epinephrine. Glucagon  also  enhances glucone

Hydrophily - cross-pollination, Hydrophily - Cross-pollination All hyd...

Hydrophily - Cross-pollination All hydrophytes are not necessarily pollinated by water. In fact most of the aquatic plant are anemophilous, e.g. Alisma, Nymphaea. Like anemoph

Explain selective and differential culture media, Explain Selective and Dif...

Explain Selective and Differential Culture Media? These are used for isolation of specific organisms. These are designed to isolate a group of closely related organisms and dif

What do you mean by punch cards, Q. What do you mean by Punch cards? Pu...

Q. What do you mean by Punch cards? Punch cards are used when the number of taxa to be keyed out is large. In this type of cards the holes at numbers corresponding to a charact

Gases are exchanged when living organisms breathe, Which two gases are exch...

Which two gases are exchanged when living organisms breathe? Oxygen and carbon dioxide are the gases exchanged when living organisms breathe.

Closed style - style of stigma interaction, Closed Style - Style of Stigma ...

Closed Style - Style of Stigma Interaction Cotton shows an epidermis with stomata, a cortex of thin-walled parenchyma with several vascular bundles and strands of transmitting

Describe shunts, Q. Describe Shunts? Detection, localization and quanti...

Q. Describe Shunts? Detection, localization and quantification of intracardiac shunts are one of the most important exercises in cardiac catheterization. In most cases a prelim

How many respectively are genotypical and phenotypical forms, In F2 generat...

In F2 generation of a hybridization for a given trait conditioned by a pair of alleles T and t, according to Mendel's first law what are the genotypes of each phenotypical form? An

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