Question

1. select the correct set of amino acids. *

1 point
dna
mrna
trna
amino
acids
thr ser ile thr met
ter ser ter trp tyr
ter tyr ser ter trp
thr ser ter trp tyr

Explanation:

1. First, transcribe DNA to mRNA: DNA sequence is ACTAGCAT TACCCATG (note: original DNA is ACTAGCAT TACCCATG? Wait, the DNA given is A C T A G C A T T A C C A T G (let's group into codons: first, DNA to mRNA: A→U, C→G, T→A, G→C. So DNA: ACT AGC ATT ACC CATG? Wait, let's split the DNA into triplets (codons). The DNA sequence is A C T A G C A T T A C C A T G. Let's group as: ACT, AGC, ATT, ACC, ATG. Now transcribe each DNA codon to mRNA:

• ACT (DNA) → mRNA: UGA (since A→U, C→G, T→A: A→U, C→G, T→A → U G A? Wait no: DNA base: A, C, T. So mRNA: U (A→U), G (C→G), A (T→A). So ACT (DNA) → UGA (mRNA).
• AGC (DNA) → mRNA: UCG (A→U, G→C, C→G? Wait A→U, G→C, C→G? No: A→U, G→C, C→G? Wait DNA A→mRNA U, DNA G→mRNA C, DNA C→mRNA G. So AGC (DNA) → UCG (mRNA).
• ATT (DNA) → mRNA: UAA (A→U, T→A, T→A → U A A).
• ACC (DNA) → mRNA: UGG (A→U, C→G, C→G → U G G).
• ATG (DNA) → mRNA: UAC (A→U, T→A, G→C → U A C).

1. Now, translate mRNA codons to amino acids (using genetic code):

• UGA: stop codon (TER).
• UCG: Serine (SER).
• UAA: stop codon (TER).
• UGG: Tryptophan (TRP).
• UAC: Tyrosine (TYR).

Wait, but the options have TER, SER, TER, TRP, TYR. Let's check the options:
Option 2: TER SER TER TRP TYR. Let's verify the codons again. Wait maybe I grouped the DNA wrong. Let's re - examine the DNA sequence: A C T A G C A T T A C C A T G. Let's write the DNA as a string: ACTAGCAT TACCCATG? Wait the original DNA is A C T A G C A T T A C C A T G. Let's split into triplets from the start:
First triplet: ACT (positions 1 - 3: A, C, T)
Second: AGC (positions 4 - 6: A, G, C)
Third: ATT (positions 7 - 9: A, T, T)
Fourth: ACC (positions 10 - 12: A, C, C)
Fifth: ATG (positions 13 - 15: A, T, G)
Transcribe each to mRNA:

• ACT (DNA) → mRNA: UGA (A→U, C→G, T→A)
• AGC (DNA) → mRNA: UCG (A→U, G→C, C→G)
• ATT (DNA) → mRNA: UAA (A→U, T→A, T→A)
• ACC (DNA) → mRNA: UGG (A→U, C→G, C→G)
• ATG (DNA) → mRNA: UAC (A→U, T→A, G→C)

Now translate:

• UGA: TER (stop)
• UCG: SER
• UAA: TER (stop)
• UGG: TRP
• UAC: TYR

So the amino acid sequence is TER, SER, TER, TRP, TYR, which matches option 2: TER SER TER TRP TYR.

Answer:

B. TER SER TER TRP TYR (assuming the second option is labeled B, as per the options: the second option is "TER SER TER TRP TYR")