if we say codon for DNA what we say for mRNA, tRNA and rRNA
For mRNA (messenger RNA), we refer to it as a nucleotide sequence or mRNA sequence.
For tRNA (transfer RNA), we refer to it as an anticodon or a tRNA molecule.
For rRNA (ribosomal RNA), we typically refer to it as a ribosome or a ribosomal subunit.
If we refer to a specific sequence of three nucleotides in DNA, we call it a codon. However, when talking about mRNA (messenger RNA), tRNA (transfer RNA), and rRNA (ribosomal RNA), we use slightly different terminology.
1. mRNA: In mRNA, the equivalent of a codon is called a "triplet" or "codon" as well. The mRNA codon is a three-nucleotide sequence that determines the specific amino acid to be incorporated into a protein during translation.
2. tRNA: In tRNA, the sequence of three nucleotides that matches the mRNA codon is referred to as an "anticodon." Each tRNA molecule carries a specific anticodon that recognizes and pairs with the complementary codon on mRNA during translation.
3. rRNA: In rRNA, which is a part of the ribosome, specific sequences of nucleotides are not referred to as codons or triplets. Instead, rRNA plays a structural role within the ribosome and helps in the process of protein synthesis.
So, to summarize, the equivalent terms for codon in different types of RNA are:
- mRNA: Codon or Triplet.
- tRNA: Anticodon.
- rRNA: N/A (no specific term used for sequences of nucleotides).
For mRNA (messenger RNA), we use the term "codon" as well. Just like DNA, mRNA also consists of a sequence of codons that determine the order of amino acids during protein synthesis.
For tRNA (transfer RNA), we use the term "anticodon." Each tRNA molecule carries a specific anticodon sequence that is complementary to the corresponding codon on the mRNA. The anticodon ensures that the correct amino acid is brought to the growing protein chain during translation.
As for rRNA (ribosomal RNA), we do not use the term "codon" since rRNA is a structural component of the ribosome and does not directly participate in coding for amino acids. Instead, rRNA helps to catalyze the formation of peptide bonds between amino acids and provides a framework for the ribosome's overall structure.