Question

hroughout the reflection, make sure you have a copy of the Student Guide.

In your experiment, you tested this prediction:

Prediction: RNA determines the sequence of amino acids in proteins and polypeptides by a two-step process: transcription of DNA produces mRNA in the nucleus, then translation of the mRNA to tRNA takes place in the ribosome in the cytoplasm.


You transcribed DNA to make
and built a sequence of amino acids through

Answer 1

It looks like your message cut off. I’ll help by (1) correcting the prediction you tested, (2) finishing the two sentences you started, and (3) giving a short, ready-to-use reflection template you can adapt and fill with your experimental details (and a list of likely sources of error and improvements).

Correction to the prediction
- Your prediction has a small inaccuracy: translation converts mRNA into a polypeptide (a sequence of amino acids) with the help of tRNA. Translation does not convert mRNA into tRNA. A corrected version:
"RNA determines the sequence of amino acids in proteins by a two-step process: transcription of DNA produces mRNA in the nucleus, then translation of the mRNA into a polypeptide takes place at ribosomes in the cytoplasm with tRNAs bringing the appropriate amino acids."

Finish the two sentences
- “You transcribed DNA to make mRNA, and built a sequence of amino acids through translation at the ribosome using tRNAs that match mRNA codons to amino acids.”

Reflection template (fill in your specific data where indicated)
1. Aim
- State the prediction you tested (corrected if needed) and the goal of the experiment.

2. Methods (brief)
- Describe how you transcribed the DNA sequence to mRNA (e.g., write the original DNA sequence and the complementary mRNA sequence).
- Describe how you translated the mRNA into an amino-acid sequence (e.g., split mRNA into codons, use the genetic code table to assign amino acids, or use the simulation/model you used).

3. Results (fill with your data)
- DNA sequence used: [insert]
- mRNA sequence produced: [insert]
- Codons (grouped): [insert]
- Amino-acid sequence produced: [insert, using 3-letter or 1-letter codes]

4. Conclusion
- State whether your results support the prediction. Example phrasing:
"The results support the prediction: transcription produced the expected mRNA, and translation (using tRNA anticodon–codon pairing) produced the predicted amino-acid sequence, demonstrating that RNA determines protein sequence."

5. Evaluation / Sources of error
- Possible issues: transcription or transcription-table errors (wrong base complement), frame-shift errors (starting at the wrong nucleotide), misread codons, mis-assignment of amino acids because of using the wrong genetic-code table (mitochondrial vs standard), or simulation/typing mistakes.
- How serious: explain which errors would change the amino-acid sequence vs which would only cause minor differences.

6. Improvements / next steps
- Check sequences carefully and show your work (write complimentary pairing step-by-step).
- Use multiple codon tables to verify ambiguous codons.
- Repeat transcription/translation for another DNA sequence or include start/stop codons to test realistic translation initiation/termination.
- If this was a classroom activity using models, run the simulation twice and have a peer check your codon assignments.

If you want, paste the DNA sequence you used and I will:
- transcribe it to mRNA,
- split it into codons,
- give the corresponding amino-acid sequence,
- and produce a completed reflection with your exact results.