Question

1. dna → aga aca taa tac ctc tta aca ctc taa aga cca gca ctc cga tga act gga gca

mrna → ucu ugu auu aug gag aavugu gag auu ucu ggu cgu gag gcu acu uga ccu cgu
protein →

Explanation:

Step1: Recall the genetic - code table

The genetic code is used to translate mRNA codons into amino - acids. Each set of 3 nucleotides (codon) in mRNA corresponds to an amino - acid.

Step2: Break mRNA into codons

The mRNA sequence is UCU UGU AUU AUG GAG AAU UGU GAG AAU UCU GGU CGU GAG GCU ACU UGA CCU CGU. We break it into groups of 3: UCU, UGU, AUU, AUG, GAG, AAU, UGU, GAG, AAU, UCU, GGU, CGU, GAG, GCU, ACU, UGA, CCU, CGU.

Step3: Translate codons to amino - acids

• UCU codes for Serine (Ser).
• UGU codes for Cysteine (Cys).
• AUU codes for Isoleucine (Ile).
• AUG is the start codon and codes for Methionine (Met).
• GAG codes for Glutamic acid (Glu).
• AAU codes for Asparagine (Asn).
• GGU codes for Glycine (Gly).
• CGU codes for Arginine (Arg).
• GCU codes for Alanine (Ala).
• ACU codes for Threonine (Thr).
• UGA is a stop codon and does not code for an amino - acid.
• CCU codes for Proline (Pro).
• CGU codes for Arginine (Arg).

The protein sequence is Met - Glu - Asn - Cys - Glu - Asn - Ser - Gly - Arg - Glu - Ala - Thr (starting from the start codon AUG and stopping at the stop codon UGA).

Answer:

Met - Glu - Asn - Cys - Glu - Asn - Ser - Gly - Arg - Glu - Ala - Thr