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A tRNA with the UUU anticodon can bind to either AAA or AAG codons
66%
340/512
There are more amino acids than possible codons
10%
49/512
The last nucleotide provides specificity for the given amino acid
14%
71/512
The genetic code is preserved without mutations
6%
30/512
Charged tRNA contains energy needed for peptide bonds to form
2%
10/512
Select Answer to see Preferred Response
The wobble phenomenon refers to the ability of some tRNA molecules to bind to multiple codons. There are more codons (61) than amino acids (20), so for each amino acid there are multiple possible codons. For example, lysine can be encoded by AAA or AAG. A single t-RNA molecule must then be able to bind to both codons - thus the bonds at the first and second positions are tighter than the third position. This is known as the wobble hypothesis. This also suggests that a mutation in the third position would be silent as it does not lead to a change in the amino acid sequence. Incorrect Answers: Answer 2: The opposite is true; there are more possible codons than amino acids. Answer 3: The last nucleotide in the codon provides the least specificity in determining the amino acid. Answer 4: The genetic code is copied with high but not complete fidelity. Answer 5: This does not describe the wobble phenomenon.
3.5
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