What molecules are largely responsible for the universal feature of the genetic code?     Ribosomes     Amino acids     Aminoacyl-tRNA-synthetase enzymes     DNA nucleotides

The attachment of an amino acid to a tRNA is called

of the following determines the amino acid sequence of the protein produced during the process of translation? ribosomes ribosomal RNA transfer RNA messenger RNA ATP

What characteristic of the genetic code explains why a substitution mutation in a codon contained within a protein coding gene does not always result in a replacement of one amino acid for another?

All of the following statements about translation are true except: Release factors recognize stop codons and prompt-cleavage of a peptide bond. Initiation factors are involved in ribosome assembly. In prokaryotes, initiator transfer RNA (tRNAf) is attached to formylmethionine. Each messenger RNA contains a start codon and a stop codon.

What is the correct sequence in translation? a   tRNA attaches to start codon, ribosome attaches to mRNA in P site, new tRNA enters on A site, peptide chain moves to old tRNA in P site, old tRNA moves to E and new tRNA to P. b   tRNA attaches to start codon, ribosome attaches to mRNA in P site, new tRNA enters on A site, peptide chain moves to new tRNA, old tRNA moves to E and new tRNA to P. c   tRNA attaches to start codon, ribosome attaches to mRNA in A site, new tRNA enters on P site, peptide chain moves to new tRNA, old tRNA moves to E and new tRNA to A. d   tRNA attaches continuously to mRNA without the need of a ribosome. Proteins are: a   the direct translation of a single gene b   in most cases, the results of post-translation control c   first transcribed from DNA by an operon d   transcription factors Which of the following statements is false? a   In the lytic cycle, new phage are produced and released into the environment. b…

Enzymes in which the catalytic portion is not made of protein include all of the following except: the large ribosomal subunit self-splicing introns peptidyl transferase infectious viroids tRNA synthetase