The enzymes that reloads empty tRNA molecules with the proper amino acid.Group of answer choicesspliceosometranscription factorRNA polymeraseaminoacyl-tRNA synthetasepolyribosomeNext

RNA molecules that function as enzymes.Group of answer choicestRNAribozymesaminoacyl-tRNA synthetasesmall RNAsrRNARNA polymeraseribosomeNext

In the activation of an amino acid for protein synthesisGroup of answer choicestwo separate enzymes are required, one to form the aminoacyl adenylate, the other to attach the amino acid to the tRNAmethionine is first formylated and then attached to a specific tRNAthe amino acid is attached to the 5 end of the tRNA through a phosphodiester bondthere is at least one specific aminoacyltRNA synthase and one specific tRNA for each amino acidAll of the above

An enzyme that links ribonucleotides into a growing RNA chain during transcription.Group of answer choicesRNA polymerasetopoisomeraseaminoacyl-tRNA synthetaseprimaseDNA ligasehelicaseDNA polymeraseNext

Aminoacyl-tRNA synthetases (amino acid activating enzymes):  Group of answer choicesin conjunction with another enzyme attach the amino acid to the tRNA.interact directly with free ribosomes.“recognize” specific tRNA molecules and specific amino acids.occur in multiple forms for each amino acid.require GTP to activate the amino acid.

The completed assembly of transcription factors and RNA polymerase bound to a promoter.Group of answer choicespolyribosometranscription initiation complexspliceosomesignal-recognition particle (SRP)signal peptideaminoacyl-tRNA synthetase