1. The piece of RNA below includes the region that codes for the binding site for the...
Question:
1. The piece of RNA below includes the region that codes for the binding site for the initiator tRNA needed in translation.
5?-GUUUCCCGUAUACAUGCGUGCCGGGGGC-3?
Which amino acid will be on the tRNA that is the first to bind to the A site of the ribosome?
(a) Methionine
(b) Arginine
(c) Cysteine
(d) Valine
2. In a haploid organism, the DNA encoding one of the tRNAs for the amino acid tyrosine is
mutated such that the sequence of the anticodon is now 5?-CTA-3? instead of 5?-GTA-3?. Protein
synthesis takes place but the proteins produced are abnormal. Some of the proteins produced
contained extra amino acids, while others contained fewer amino acids than normal.
Explain why some proteins contained extra amino acids [1] while others contained fewer amino
acids than normal. [1]