Question

Describe with short information to the following terms:-
1. m-RNA
2. r-RNA
3. t-RNA

Answer 1

Messenger RNA (mRNA) carries the genetic information copied from DNA in the form of a series of three-base code “words,” each of which specifies a particular amino acid.
- Transfer RNA (tRNA) is the key to deciphering the code words in mRNA. Each type of amino acid has its own type of tRNA, which binds it and carries it to the growing end of a polypeptide chain if the next code word on mRNA calls for it. The correct tRNA with its attached amino acid is selected at each step because each specific tRNA molecule contains a three-base sequence that can base-pair with its complementary code word in the mRNA.
- Ribosomal RNA (rRNA) associates with a set of proteins to form ribosomes. These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains. They also bind tRNAs and various accessory molecules necessary for protein synthesis. Ribosomes are composed of a large and small subunit, each of which contains its own rRNA molecule or molecules.

Answer 2

HÈLLØ...!!

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✔️ m-RNA

• It is a linear molecule.

• It's synthesis takes place on DNA by the process called transcription.

• It carries genetic information from Nucleus to the site of protein synthesis.

• it forms about 5% of the total cell RNA.

✔️ r-RNA

• It is a linear molecule folded at certain regions due to complementation of nitrogenous bases.

• It is associated with ribosomes it forms about 80% of the total cell RNA.

✔️ t-RNA

• It is soluble RNA with hair pin or clover leaf like structure.

• This is the smallest among three types.

• It forms about 10 - 15% of the total cell RNA.

• It carries activated amino acids to ribosomes and helps in elongation of polypeptide chain during the process of translation.

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