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IB Biology HL A3.1.10 Comparison of Genome Sizes Questions

Genome size is the amount of DNA in one chromosome set. A larger genome does not necessarily mean a more complex organism, and polyploidy can greatly increase genome size, especially in plants.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Define genome size as the amount of DNA in one chromosome set.
  • Explain that a larger genome size does not necessarily mean greater organism complexity.
  • Explain how polyploidy can greatly increase genome size, especially in plants.

IB Biology HL A3.1.10 Comparison of Genome Sizes Questions question 1

[Maximum number: 1]

The scattergraph shows the genome sizes of four Enterococcus species.

Figure for Question IB Biology HL A3.1.10 Comparison of Genome Sizes Questions question 1 — IB Biology HL

What can be concluded about the genomes in Enterococcus?

A

E. pallens has the greatest number of genes.

B

E. faecalis and E. faecium have the same mean number of genes.

C

The total genetic information in Enterococcus is constant within each species.

D

E. pallens has more DNA than E. columbae.

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