1. tRNA molecules are linked to their respective amino acids by enzymes called :   aminoacyl-tRNA synthetases   beta-galactosidases   phenylalanine hydroxylases   Ornithine decarboxylases   Hint Half-n-half Clue   2. Synthesis of proteins can take place quickly by multiple ribosomes being able to attach themselves to one mRNA chain. An mRNA chain with multiple ribosomes is called :   a peroxisome   a centrosome   a lysosome   a polysome   Half-n-half Clue   3. The base inosine is usually found in :   tRNA   hnRNA   rRNA   mRNA   Half-n-half Clue   4. The movement of peptidyl tRNA from the A site to the P site (of the larger ribosomal subunit) and the movement of mRNA in relation to the ribosome is called :   RNA processing   elongation   translocation   dislocation   Half-n-half Clue   5. A sequence of about 5 to 20 bases seperating one stop codon from the next start codon in a polycistronic prokaryotic mRNA molecule is called :   a transposon   a Shine Dalgarno sequence   a spacer   a poly-A-tail   Half-n-half Clue   6. The difference in the products translated from a tricistronic mRNA molecule by the ribosomes of prokaryotes and eukaryotes is that :   the prokaryotic ribosome translates only one cistron while the eukaryotic ribosome translates all cistrons.   the eukaryotic ribosome translates only one cistron while the prokaryotic ribosome translates all cistrons.   the eukaryotic ribosome will produce one polyprotein instead of three smaller proteins.   None of the above.   Half-n-half Clue   7. The triplet base sequence in DNA that is translated into a stop codon, whose corresponding tRNA anticodon, is AUU is given by :   ATT   GCC   TAA   CGG   Half-n-half Clue