RNA STRUCTURE DETAILED CONCEPT

RNA is a polymer of ribonucleotides held together by 3 ,5 –phosphodiester bridges.

Although RNA has certain similarities with DNA structure ,they  have several specific differences.

1.Pentose The sugar  :in RNA is ribose in contrast to deoxyribose in DNA. 

2.pyrimidine: RNA contains the pyrimidine uracil in place of thymine

3.Single strand: RNA is usually a single stranded polynucleotide. How ever, this strand may fold at certain places to give a double stranded structure, if complementary base pairs are in close proximity.

4.chargaff”srule – not obeyed : Due to the single- stranded nature, there is no specific relation between purine and pyrimidine contents.

Thus the guanine contents is not equal to cytosine(as is the case in DNA)

5.Susceptability to alkali hydrolysis : Alkali can hydrolyze RNA to 2,3-cyclic diesters.

This is possible due to the presence of a hydroxyl group at 2 position.

DNA cannot be subjected to alkali hydrolysis due to lack of this group.

6.Orcinol color reaction :RNAs can be histologically identified by orcinol color reaction due  to the presence of ribose.

Types of RNA: mRNA, rRNA and tRNA

RNA or ribonucleic acid is a polymer of nucleotides that is made up of a ribose sugar, a phosphate, and bases such as adenine, guanine, cytosine, and uracil.

It plays a crucial role in gene expression by acting as the intermediate between the genetic information encoded by DNA and protein RNA has a structure very similar to that of DNA.

The key difference in RNA structure is that the ribose sugar in RNA possesses a hydroxyl (-OH) group that is absent in DNA.

and much more you can find in session presentations.

Rating Distribution

• 1 stars: 0 votes
• 2 stars: 0 votes
• 3 stars: 1 votes
• 4 stars: 0 votes
• 5 stars: 2 votes

Frequently Asked Questions

How long do I have access to the course materials?

You can view and review the lecture materials indefinitely, like an on-demand channel.

Can I take my courses with me wherever I go?

Definitely! If you have an internet connection, courses on Udemy are available on any device at any time. If you don’t have an internet connection, some instructors also let their students download course lectures. That’s up to the instructor though, so make sure you get on their good side!