A predict has the sequences NH_2 PHe-Pro-lys-gly-pro-COOH. which of the followin

Question

A predict has the sequences NH_2 PHe-Pro-lys-gly-pro-COOH. which of the following sequences in the coding standard of the DNA could code for this predict? A) 3'UUU-CCC-AAA-GGG-UUU-CCC B) 3' -AUG-AAA-GGG-TTT-CCC-AAA-GGG D) 5'-GGG-AAA-TTT-AAA -CCC-ACT-GGG E) 5' ACT-TAC-CAT-AAA-CAT-TAC-UGA A part of mRNA molecule with the following sequence is being read by 5' CCG- ACG 3' (mRNA). The following charged transfer RNA molecules (with their anticodons shown in the 3' to 5' direction) are available. Two of them can correctly match the mRNA so that a dipeptide can form. The dipeptide that will form will be A) cysteine-alanine. B) proline-threonine. C) glycine-cysteine D) alanine-alanine. E) threonine-glycine. The anticodon loop of the first tRNA that will complement this mRNA is

Explanation / Answer

Question: 46. What aminoacid sequence will be generated, found on the following mRNA codon sequence? 5' AUG - UCU - UCG - UUA - UCC - UUG 3'

Answer: D) Met - Ser - Ser - Leu - ser - Leu

Hence the aminoacid sequence is Met - Ser - Ser - Leu - ser - Leu

Answer: 47. C) 5' TTT CCC AAA GGG TTT CCC 3' (Coding strand)

The sequence of the coding strand of DNA runs in 5' -> 3' direction. Amino acid residues of proteins are specified as triplet codons.

(5' -> 3') TTT CCC AAA GGG TTT CCC (Coding strand)
(3' <- 5') AAA GGG TTT CCC AAA GGG (Template strand)

(5' -> 3') UUU CCC AAA GGG UUU CCC (mRNA made from Template strand, the code for the mRNA contains U (uridine) rather than T)

The protein sequence made from the above example is Phe-Pro-Lys-Gly-Phe-Pro.

Aminoacid Codon Abbreviation AUG Methionine Met UCU Serine Ser UCG Serine Ser UUA Leucine Leu UCC Serine Ser UUG Leucine Leu

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