The piece of rna below includes the region that codes for the binding site for the initiator trna needed in translation. 5′--3′ which amino acid will be on the trna that is the first to bind to the a site of the ribosome?

The answer is valine. This is because the amino acid is coded for by codons GUU, GUC, GUA, and GUG. The tRNA will have CAA, CAG, CAU, or CAC anticodons so that it can identify the above codon in the mRNA during translation in the ribosome.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.