Drag the terms on the left to the appropriate blanks on the right to complete th

Question

Drag the terms on the left to the appropriate blanks on the right to complete the sentences.

It has been suggested that the present-day triplet genetic code evolved from a doublet code when there were fewer amino acids available for primitive protein synthesis. The amino acids Ala, Val, Gly, Asp, and Glu are all early members of biosynthetic pathways (Taylor and Coates, 1989) and are more evolutionary conserved than other amino acids (Brooks and Fresco, 2003). They therefore probably represent "early" amino acids. Of what significance is this information in terms of the evolution of the genetic code? Al the amino acids mentioned use guanine as the first base in each codon. We might therefore suppose that the GNN configuration was the starting point of the present-day code. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. All the amino acids mentioned as primitive use as the base in each codon. We might therefore suppose that the GNN configuration was the point of the present day code. This question will be shown after you complete previous question(s). As determined by comparisons of ancient and recently evolved proteins, cysteine, tyrosine, and phenylalanine appear to be Late-arriving amino acids. In addition, they are considered to have been absent in the abiotic earth (Miller, 1987). All three of these amino acids have only two codons each, while many others, earlier in origin, have more. Is this mere coincidence, or might there be some underlying explanation?

Explanation / Answer

Fill the blanks using Guanine in the first box followed by First in the second box and last box by Starting

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