Photo AI
The table shows the anticodon sequence on tRNA molecules and the specific amino acid each carries - Scottish Highers Biology - Question 2 - 2019
Question 2
The table shows the anticodon sequence on tRNA molecules and the specific amino acid each carries. | Anticodon sequence | Amino acid | |---------------------|----... show full transcript
Worked Solution & Example Answer:The table shows the anticodon sequence on tRNA molecules and the specific amino acid each carries - Scottish Highers Biology - Question 2 - 2019
Step 1
Identify the amino acids from the given anticodon sequences
Answer
From the provided table, the anticodons and their respective amino acids are as follows:
- CCA: proline
- AAG: lysine
- UAU: tyrosine
- AUU: isoleucine
Based on the sequence given in the diagram, the protein starts with proline followed by two lysines and then continues with tyrosine and isoleucine.
Step 2
Determine the triplets of DNA nucleotides
Answer
We need to find the DNA triplet combination that matches the amino acid sequence (proline - lysine - lysine - tyrosine - isoleucine).
Referencing the data:
- Proline is coded by CCA.
- Lysine is coded by AAG.
- Tyrosine is coded by UAC (which means ACG in terms of DNA nucleotides).
- Isoleucine is coded by AUU (AAT in DNA).
Thus, the corresponding DNA triplets would be CCA, AAG, AAG, UAC, and AAT.
In the options provided:
- A: CCA AAG UAC AUU – This is correct based on our identification.