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IB Biology SL A4.1.2 Evidence From Sequences Questions

The universality of DNA, the genetic code, ATP use and core metabolism supports common ancestry. Differences in DNA, RNA and protein sequences indicate relatedness and evolutionary divergence.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Use the universality of DNA, the genetic code, ATP use and core metabolism as evidence for common ancestry.
  • Compare DNA, RNA and protein sequence differences to infer relatedness and evolutionary divergence.

IB Biology SL A4.1.2 Evidence From Sequences Questions question 1

[Maximum number: 1]

What is a piece of evidence that all living organisms share a common ancestor?

A

They manufacture the same proteins.

B

They obtain energy from glucose.

C

DNA triplets code for the same amino acids.

D

Cells can synthesise all the amino acids.

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