You have identified various tRNAs from a variety of hypothetical orgainisms. Giv

Question

You have identified various tRNAs from a variety of hypothetical orgainisms. Given the anticodon of the tRNA, determine if each tRNA individually could conform to the nearly universal genetic code. Assume that the tRNA in question can only be charged with one amino acid and it is the same amino acid everytime. If the tRNA is not intended to be charged with an amino acid, it can never be charged with an amino acid.

1. Anticodon: 3' U C U 5'

Could this tRNA conform to the nearly universal genetic code?

Select one:

() yes

() no

2. Anticodon: 3' A G I 5'

Could this tRNA conform to the nearly universal genetic code?

Select one:

() yes

() no

Explanation / Answer

Answer:

1). Yes

UCU anticodon brings arginine in all organism (universal)

2). No

Due to the degeneracy of the genetic code, the third base is less discriminatory for the amino acid than the other two bases. This third position in the codon (I) is referred to as the wobble position. At this position Uracils and Cytosiness may be read by a G in the anticodon.

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