Question

Consider the following DNA nucleotides, where A, C, G, and T represent adenine, cytosine, guanine, and thymine:
TAC TTT TTG CTC ATC

Choose the correct order of coded amino acids.

• A. Tyrosine, phenylalanine, leucine, leucine, isoleucine
• B. Histidine, phenylalanine, valine, leucine, leucine
• C. Leucine, phenylalanine, methionine, leucine, stop
• D. Arginine, proline, proline, serine, alanine
• E. Methionine, lysine, asparagine, glutamic acid, stop

Answer 1

The correct option is E Methionine, lysine, asparagine, glutamic acid, stop

mRNA sequence is the complimentary to that of the DNA template strand. RNA differs from DNA in having Uracil base in place of Thymine; A pairs with U and G with C in RNA. The given DNA sequence " TAC TTT TTG CTC ATC" will code for AUG AAA AAC GAG UAG. Looking into the genetic code table, AUG (methionine) AAA (lysine) AAC (asparagine) GAG (glutamic acid) UAG (stop); the encoded protein will have Methionine- lysine-asparagine-glutamic acid sequence. Thus, the correct answer is option E.