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Question 22M.2.HL.TZ1.c

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.HL.TZ1.c
Level HL Paper 2 Time zone TZ1
Command term Outline Question number c Adapted from N/A
c.
[Maximum mark: 2]
22M.2.HL.TZ1.c

Hemoglobin is a conjugated protein consisting of four polypeptide chains with attached heme groups.

[Source: LAGUNA DESIGN/Science Photo Library via Getty Images.]

Outline the role of tRNA in hemoglobin synthesis.

[2]

Markscheme
  1. decoding/translation (of the genetic code/RNA base sequence);
  2. carries/brings one amino acid/a specific amino acid/the amino acid (corresponding to codon/anticodon);
  3. tRNA has an anticodon which pairs with mRNA/is complementary to a codon (on mRNA);
Examiners report

There were varied answers to this question. The best made it clear that a tRNA molecule carries one specific amino acid corresponding to its anticodon and to the codon on mRNA to which it binds during translation.

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