Describe how one amino acid is added to a polypeptide that is being formed at a ribosome during translation - AQA - A-Level Biology - Question 3 - 2021 - Paper 1
Question 3
Describe how one amino acid is added to a polypeptide that is being formed at a ribosome during translation.
1. tRNA brings specific amino acid to the ribosome.
2. ... show full transcript
Worked Solution & Example Answer:Describe how one amino acid is added to a polypeptide that is being formed at a ribosome during translation - AQA - A-Level Biology - Question 3 - 2021 - Paper 1
Step 1
tRNA brings specific amino acid to ribosome
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Answer
Transfer RNA (tRNA) conveys a specific amino acid to the ribosome, ensuring that the correct amino acid is added to the polypeptide chain based on the genetic code.
Step 2
Anticodon on tRNA binds to codon on mRNA
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Answer
The tRNA molecule has an anticodon that pairs with the complementary codon on the messenger RNA (mRNA), which is essential for the accurate addition of the amino acid.
Step 3
Amino acids join by condensation reaction
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Answer
The amino acids are linked together via peptide bonds through a condensation reaction, where a molecule of water is released, and this process usually requires energy, supplied by ATP.
