Question

What is an mRNA codon ?

Answer 1

In order to make the proteins DNA is transcripted into messenger RNA that is also written as mRNA.A mRNA codon can be described as a 3 base pair long part of the mRNA that performs the function of coding for a specific amino acid in the ribosomes of a cell.

Complete answer:
The genes in DNA are responsible for encoding protein molecules, which are crucial for carrying out necessary functions for life. Expressing a gene means to manufacture its corresponding protein, this process includes two steps. Initially in the first step, through the process of transcription the information from DNA is transferred to a messenger RNA (mRNA) molecule. During this process, the DNA of a gene acts as a template for complementary base-pairing, and the catalyzation of the formation of a pre-mRNA molecule is performed by an enzyme termed as RNA polymerase ii, which then leads to formation of mature mRNA. The resulting mRNA can be described as a single-stranded copy of the gene, which further gets translated into a protein molecule. During the second step in gene expression that is translation, the mRNA is "read" according to the genetic code, which plays a vital role in relating the DNA sequence to the amino acid sequence in proteins. Each group of three bases in mRNA compose a codon, and each codon specifies a particular amino acid, thus referred to as a triplet code. The mRNA sequence is used as a template in order to assemble the chain of amino acids that leads to formation of a protein.

Note:
The total number of different types of codons present in mRNA are 64 from which 61 specify amino acids while the other three act as stop signals.Translation takes place in four stages named as activation, initiation, elongation and termination (stop). An anticodon can be described as a trinucleotide sequence present at one end of a transfer RNA(tRNA) molecule that is complementary in nature to a corresponding codon in a messenger RNA (mRNA) sequence.