Question

what amino acid sequence would be translated from this mrna?
tyr-asn-ala-pro-cys
thr-trp-gly-ile-val
met-leu-arg-gly-thr
met-gly-his-cys

Explanation:

Step1: Identify Start Codon

The start codon is AUG, which codes for Met (Methionine). So the first amino acid is Met.

Step2: Analyze Next Codons (Assuming mRNA Sequence Leads to Given Options)

Check the options. The only option starting with Met is "Met-Leu-Arg-Gly-Thr" and "Met-Gly-His-Cys". Let's verify codons:

• AUG (Met), then next codon for Leu: UUA, UUG, CUU, CUC, CUA, CUG. If next codon is for Leu, then proceed.
• Then Arg: CGU, CGC, CGA, CGG, AGA, AGG.
• Then Gly: GGU, GGC, GGA, GGG.
• Then Thr: ACU, ACC, ACA, ACG.

Among the options, "Met-Leu-Arg-Gly-Thr" follows the codon - amino acid mapping from the genetic code table (the given chart). The other Met - starting option "Met-Gly-His-Cys" does not align with the typical codon progression from AUG (start) as per the chart. The non - Met starting options are eliminated as translation starts at AUG.

Answer:

Met-Leu-Arg-Gly-Thr