1. tRNA molecules are linked to their respective amino acids by enzymes called :   aminoacyl-tRNA synthetases   phenylalanine hydroxylases   beta-galactosidases   Ornithine decarboxylases   Hint Half-n-half Clue   2. If the mammalian genetic code were a four letter code, then it would have the potential to encode...   256 amino acids   128 amino acids   64 amino acids   216 amino acids   Half-n-half Clue   3. How many amino acids are encoded by the following mRNA sequence : UAUCAUCCACUUGGUUGA ?   6   4   7   5   Half-n-half Clue   4. Which of the following pairs of codons encode the same protein ?   UAA and UAC   UAG and UAC   GUA and GUG   AUG and AUC   Half-n-half Clue   5. Every polypeptide chain formed in translation starts with the amino acid :   alanine   lysine   serine   methionine   Half-n-half Clue   6. The triplet base sequence in DNA that is translated into a stop codon, whose corresponding tRNA anticodon, is AUU is given by :   GCC   CGG   TAA   ATT   Half-n-half Clue   7. 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 :   elongation   dislocation   RNA processing   translocation   Half-n-half Clue