| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.SL.TZ1.9 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Identify | Question number | 9 | Adapted from | N/A |
Question
What sequence of processes is carried out by the structure labelled X during translation?
A. Combining with an amino acid and then binding to an anticodon
B. Binding to an anticodon and then combining with an amino acid
C. Binding to a codon and then combining with an amino acid
D. Combining with an amino acid and then binding to a codon
Markscheme
D
Examiners report
Some teachers argued that C could be a correct answer to this question. This is not true, as the transfer RNA joins the amino acid and then it joins to the codon. The drawing is a little unclear as it does not show the amino acid joined to the tRNA.
Syllabus sections
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- 12M.1.SL.TZ2.9: What is formed during transcription? A. RNA strand complementary to DNA strand, formed by...
- 09M.1.HL.TZ2.11: On which molecule is a codon found? A. DNAB. mRNAC. tRNAD. rRNA
- 10N.2.SL.TZ0.1e(ii): Outline the difference in mRNA production for the three genes during the submergence period...
- 10N.2.SL.TZ0.3d: Outline the use of polymerase chain reaction (PCR) to copy and amplify minute quantities of DNA.
- 09N.2.SL.TZ0.2c: Explain the role of transfer RNA (tRNA) in the process of translation.
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- 16M.1.SL.TZ0.6: This is a sequence of nucleotides from a section of mRNA. AUGAAACGCACGCAG From which DNA...
- 16M.3.SL.TZ0.2c: Explain the pattern shown in generation 3.0.
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- 13M.2.HL.TZ2.5b: Outline transcription in prokaryotes.
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- 10M.2.SL.TZ1.5b: Explain how the base sequence of DNA is conserved during replication.
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- 13N.2.SL.TZ0.3b: Explain DNA replication.
- 09M.1.SL.TZ1.10: What is a codon? A. A sequence of nucleotides on rRNA that corresponds to an amino acid B. A...
- 10M.1.SL.TZ2.12: The graph below shows the effect of temperature on the separation of the strands in DNA to...
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- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
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- 10N.2.SL.TZ0.4c: Explain the significance of complementary base pairing for replication, transcription and...
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- 17M.1.HL.TZ1.9: A strand of mRNA consists of the following nucleotides: AUUCUGGCUA Which of the following...
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- 12M.2.SL.TZ2.6c: Discuss the relationship between one gene and one polypeptide.
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- 12N.2.SL.TZ0.3c: DNA in chromosomes undergoes replication before mitosis. Outline how complementary base...
- 10N.2.SL.TZ0.1e(iii): Compare the mRNA production for the three genes during the submergence period between the two...
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- 16M.2.HL.TZ0.5b: Explain the roles of specific enzymes in prokaryote DNA replication.
