41.
The specificity of initiator $$tRNA$$  but absent in elongator $$tRNA\,\left( {tRNA_m^{met}} \right)$$    is conferred by

44.
Three types of RNA involved in comprising the structural and functional core for protein synthesis, serving as a template for translation, and transporting amino acid, respectively, are

47.
At the completion of DNA replication, each newly synthesized DNA strand is