Where is mRNA translated into amino acids?
the ribosome
The mRNA is then pulled through the ribosome; as its codons encounter the ribosome’s active site, the mRNA nucleotide sequence is translated into an amino acid sequence using the tRNAs as adaptors to add each amino acid in the correct sequence to the end of the growing polypeptide chain.
What is an amino acid sequence from mRNA?
Each group of three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid (hence, it is a triplet code). The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein.
How was the DNA code decoded?
During transcription, a portion of the cell’s DNA serves as a template for creation of an RNA molecule. (RNA, or ribonucleic acid, is chemically similar to DNA, except for three main differences described later on in this concept page.)
What converts mRNA into a protein?
Messenger RNA (mRNA) is translated into protein by the joint action of transfer RNA (tRNA) and the ribosome, which is composed of numerous proteins and two major ribosomal RNA (rRNA) molecules.
Why is mRNA longer than protein?
The coding sequence of an mRNA alone is about an order of magnitude heavier by mass than the protein. By way of contrast, mRNA is more likely to have a linear structure punctuated by secondary structures in the form of hairpin stem-loops and pseudoknots, but is generally much more diffuse and extended.
How many amino acids will be coded by the mRNA sequence?
One amino acid codes triplet three nucleotide. So, after addition of adenosine residue the total number of nucleotide is 16. So five amino acids will be coded by the mRNA sequence.
What is the mRNA sequence?
The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein. Multiple codons can code for the same amino acid. The codons are written 5′ to 3′, as they appear in the mRNA. AUG is an initiation codon; UAA, UAG, and UGA are termination (stop) codons.
Why is uracil used instead of thymine?
Uracil is energetically less expensive to produce than thymine, which may account for its use in RNA. In DNA, however, uracil is readily produced by chemical degradation of cytosine, so having thymine as the normal base makes detection and repair of such incipient mutations more efficient.
What is AUG codon?
START codons The codon AUG is called the START codon as it the first codon in the transcribed mRNA that undergoes translation. AUG is the most common START codon and it codes for the amino acid methionine (Met) in eukaryotes and formyl methionine (fMet) in prokaryotes.
What process converts the mRNA into a sequence of amino acids?
Translation is the process that takes the information passed from DNA as messenger RNA and turns it into a series of amino acids bound together with peptide bonds. It is essentially a translation from one code (nucleotide sequence) to another code (amino acid sequence).
What process converts mRNA message into a sequence of amino acids?
The process of converting the mRNA ‘message’ into a sequence of amino acids is known as translation. The mRNA is decoded during the process of translation in which the ribosomes in the cytoplasm or the endoplasmic reticulum synthesizes the proteins in the cell’s nucleus after the process of transcription of DNA to RNA.