What is meant by Monocistronic mRNA?
Monocistronic mRNA is a mRNA that encodes only one protein and all eukaryotic mRNAs are monocistronic. The development of the mature monocistronic eukaryotic transcript involves several different processing steps.
What are the 3 types of messenger RNA?
In both prokaryotes and eukaryotes, there are three main types of RNA – messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA).
How do you read a mRNA table?
mRNA codons are read from 5′ to 3′ , and they specify the order of amino acids in a protein from N-terminus (methionine) to C-terminus. Translation involves reading the mRNA nucleotides in groups of three; each group specifies an amino acid (or provides a stop signal indicating that translation is finished).
What are monocistronic and polycistronic mRNA?
Monocistronic mRNA consists of a single cistron while polycistronic mRNA consists of more than two cistrons. Most eukaryotic genes produce monocistronic mRNA while the prokaryotic operons produce polycistronic mRNA. The main difference between monocistronic and polycistronic mRNA is the number of cistrons in the mRNA.
Which of the following is monocistronic?
Eukaryotic mRNAs are monocistronic which are transcribed from a single gene and thus carry single initiation and termination codons thereby coding for a single polypeptide.
What are the 3 types of RNA and their functions?
There are three types of RNA: mRNA, tRNA, and rRNA. mRNA is the intermediary between the nucleus, where the DNA lives, and the cytoplasm, where proteins are made. rRNA and tRNA are involved in protein synthesis. Additional RNAs are involved in gene regulation and mRNA degradation.
What does a codon chart tell you?
The full set of relationships between codons and amino acids (or stop signals) is called the genetic code. The genetic code is often summarized in a codon chart (or codon table), where codons are translated to amino acids.
What is the difference between monocistronic and polycistronic RNA?
The monocistronic transcription unit contains a structural gene coding for only one polypeptide (mostly in eukaryotic cells), whereas the polycistronic transcription unit contains structural genes coding for more than one polypeptides (mostly in prokaryotic cells).