ANSWERED] Codon Worksheet Use the codon table to complete the DNA ... - Free Printable

Let’s solve this step by step.

You are given a Codon Table (which maps mRNA codons to amino acids) and a table with some filled-in values. Your task is to complete the missing entries for:

- DNA triplet (template strand — remember: DNA → mRNA is transcribed using complementary base pairing, with T→A, A→U, C→G, G→C)
- mRNA codon
- tRNA anticodon (complementary to mRNA codon: A↔U, C↔G)
- Amino acid (from the codon table)

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Step-by-step Completion:

We’ll go row by row.

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#### Row 1: mRNA = AAG

- tRNA anticodon: Complementary to AAG → UUC
- Amino acid: Look up AAG in codon table → Lys (Lysine)
- DNA triplet: Template strand that codes for mRNA AAG → complementary bases:
A (in mRNA) ← T (in DNA)
A ← T
G ← C
So DNA = TTC

✔ Completed:
DNA: TTC | mRNA: AAG | tRNA: UUC | Amino Acid: Lys

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#### Row 2: DNA = GGC

- Transcribe to mRNA: G→C, G→C, C→G → CCG
- tRNA anticodon: Complementary to CCG → GGC
- Amino acid: CCG → Pro (Proline)

✔ Completed:
DNA: GGC | mRNA: CCG | tRNA: GGC | Amino Acid: Pro

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#### Row 3: mRNA = CAG

- tRNA anticodon: Complementary → GUC
- Amino acid: CAG → Gln (Glutamine)
- DNA triplet: Complementary to CAG → G→C, A→T, G→C → GTC

✔ Completed:
DNA: GTC | mRNA: CAG | tRNA: GUC | Amino Acid: Gln

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#### Row 4: tRNA = UUA

- mRNA codon: Complementary to UUA → AAU
- Amino acid: AAU → Asn (Asparagine)
- DNA triplet: Complementary to AAU → TTA

✔ Completed:
DNA: TTA | mRNA: AAU | tRNA: UUA | Amino Acid: Asn

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#### Row 5: DNA = AAA

- mRNA: AAA → UUU (transcription: A→U, A→U, A→U)
- tRNA: Complementary to UUU → AAA
- Amino acid: UUU → Phe (Phenylalanine)

✔ Completed:
DNA: AAA | mRNA: UUU | tRNA: AAA | Amino Acid: Phe

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#### Row 6: DNA = GTA

- mRNA: G→C, T→A, A→U → CAU
- tRNA: Complementary to CAU → GUA
- Amino acid: CAU → His (Histidine)

✔ Completed:
DNA: GTA | mRNA: CAU | tRNA: GUA | Amino Acid: His

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#### Row 7: tRNA = CUC

- mRNA: Complementary → GAG
- Amino acid: GAG → Glu (Glutamic acid)
- DNA: Complementary to GAG → CTC

✔ Completed:
DNA: CTC | mRNA: GAG | tRNA: CUC | Amino Acid: Glu

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#### Row 8: mRNA = ACA

- tRNA: Complementary → UGU
- Amino acid: ACA → Thr (Threonine)
- DNA: Complementary to ACA → TGT

✔ Completed:
DNA: TGT | mRNA: ACA | tRNA: UGU | Amino Acid: Thr

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#### Row 9: DNA = TAT

- mRNA: T→A, A→U, T→A → AUA
- tRNA: Complementary → UAU
- Amino acid: AUA → Ile (Isoleucine)

✔ Completed:
DNA: TAT | mRNA: AUA | tRNA: UAU | Amino Acid: Ile

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#### Row 10: mRNA = AGC

- tRNA: Complementary → UCG
- Amino acid: AGC → Ser (Serine)
- DNA: Complementary to AGC → TCG

✔ Completed:
DNA: TCG | mRNA: AGC | tRNA: UCG | Amino Acid: Ser

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#### Row 11: tRNA = AUU

- mRNA: Complementary → UAA
- Amino acid: UAA → Stop (Termination codon)
- DNA: Complementary to UAA → ATT

✔ Completed:
DNA: ATT | mRNA: UAA | tRNA: AUU | Amino Acid: Stop

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#### Row 12: DNA = CCA

- mRNA: C→G, C→G, A→U → GGU
- tRNA: Complementary → CCA
- Amino acid: GGU → Gly (Glycine)

✔ Completed:
DNA: CCA | mRNA: GGU | tRNA: CCA | Amino Acid: Gly

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#### Row 13: tRNA = GGC

- mRNA: Complementary → CCG
- Amino acid: CCG → Pro
- DNA: Complementary to CCG → GGC

✔ Completed:
DNA: GGC | mRNA: CCG | tRNA: GGC | Amino Acid: Pro

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Final Completed Table:

| DNA triplet | mRNA codon | tRNA anticodon | Amino Acid |
|-------------|------------|----------------|------------|
| TTC | AAG | UUC | Lys |
| GGC | CCG | GGC | Pro |
| GTC | CAG | GUC | Gln |
| TTA | AAU | UUA | Asn |
| AAA | UUU | AAA | Phe |
| GTA | CAU | GUA | His |
| CTC | GAG | CUC | Glu |
| TGT | ACA | UGU | Thr |
| TAT | AUA | UAU | Ile |
| TCG | AGC | UCG | Ser |
| ATT | UAA | AUU | Stop |
| CCA | GGU | CCA | Gly |
| GGC | CCG | GGC | Pro |

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Answers to Questions:

> 1. What 3 codons act as termination signals?

From the codon table:
- UAA
- UAG
- UGA

These are the stop codons — they signal termination of translation.

> 2. What codon means start?

The start codon is AUG, which codes for the amino acid Methionine (Met) and initiates translation.

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✔ All done! Let me know if you’d like this formatted as a printable table or need further explanation.