Final answer:
The 72/76 pairs mentioned are part of the intramolecular base pairing within the tRNA molecule.
Step-by-step explanation:
tRNA (transfer RNA) is essential in the process of translating the genetic code into proteins. The statement 'tRNA shows 72/76 pairs involved in' refers to the base pairing that occurs within the tRNA molecule. Transfer RNA molecules have a complex structure that includes a series of intramolecular base pairs which help them to fold into their characteristic L-shaped 3D structure slash cloverleaf 2D structure. These base pairs are crucial for the molecule's function during protein synthesis.
tRNA molecules contain a specific sequence of three nucleotides called an anticodon which is complementary to a codon on the mRNA strand. This anticodon-codon pairing guides the tRNA in delivering the correct amino acid to the growing polypeptide chain. Additionally, modifications in certain nucleotides of tRNA, such as A73 and G1-C72, can significantly impact the efficiency of aminoacyl-tRNA synthesis, underscoring the importance of these elements for proper tRNA function.