List and describe the 3 binding sites for tRNA molecules.
a) A-site: binds to the incoming aminoacyl-tRNA, P-site: holds the tRNA carrying the growing polypeptide chain, E-site: where discharged tRNAs leave the ribosome.
b) Alpha-site: binds to the mRNA, Beta-site: holds the ribosome together, Gamma-site: where the polypeptide chain is synthesized.
c) X-site: binds to the ribosome, Y-site: holds the mRNA in place, Z-site: where translation initiation occurs.
d) Primary site: binds to DNA, Secondary site: holds the RNA polymerase, Tertiary site: where transcription termination occurs.