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IB Biology HL 1.2.10 Universal Genetic Code Question Bank

Practise IB Biology HL 1.2.10 by evaluating universal-code evidence and exceptions, then linking codon translation to gene transfer.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Evaluate evidence for a universal code and exceptions such as mitochondrial codon assignments.
  • Explain how shared codon translation enables transferred genes to make matching proteins.

A1.2.10—Conservation of genetic code question 1

[Maximum number: 1]

What provides evidence for the universal nature of the genetic code?

A

Uracil replaces thymine in RNA

B

The amount of A is equal to the amount of T and the amount of G is equal to the amount of C

C

Nucleic acids contain the same bases in all species

D

mRNA codons are assigned to the same amino acids in different species

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