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KEAM Translation — practice questions

Explore 3 free Translation questions in KEAM Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Translation questions and exercises with answers

Showing questions 1–3 of 3.

Translation occurs at the **ribosome**. The codon currently being read sits at the:Read the answer and worked solution →Cloverleaf t-RNA structure has, at the 3'-acceptor end, the universal sequence:Read the answer and worked solution →If the anticodon of a tRNA is **3'-UAC-5'**, the corresponding mRNA codon is (read 5'→3'):Read the answer and worked solution →

Worked practice questions

Translation occurs at the **ribosome**. The codon currently being read sits at the:

  1. A site
  2. P site
  3. E site
  4. Both A and P together (during peptide bond formation)
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Correct answer: D. Both A and P together (during peptide bond formation)

**During elongation:** incoming aminoacyl-tRNA enters the **A** site (matching its codon). The growing peptide chain on P-site tRNA is transferred to A-site amino acid, forming a peptide bond. Ribosome translocates so that the now-empty tRNA moves to E site (exit), and A becomes P for the next cycle.

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Cloverleaf t-RNA structure has, at the 3'-acceptor end, the universal sequence:

  1. AUG
  2. CCA
  3. UAC
  4. AAUAAA
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Correct answer: B. CCA

Every tRNA terminates with the 3'-CCA-OH sequence (unpaired), to which the cognate amino acid attaches via aminoacyl-tRNA synthetase. The anticodon loop (opposite end) recognises mRNA codon.

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If the anticodon of a tRNA is **3'-UAC-5'**, the corresponding mRNA codon is (read 5'→3'):

  1. 5'-AUG-3' (start, methionine)
  2. 5'-CAU-3'
  3. 5'-TAC-3'
  4. 5'-UAC-3'
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Correct answer: A. 5'-AUG-3' (start, methionine)

Anticodon 3'-UAC-5' pairs antiparallel with codon 5'-AUG-3'. Note A pairs with U, U with A, C with G. This is the initiator tRNA (methionine).

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