IB Biology SL A1.2.1 Dna As Genetic Material Questions

Review DNA as the genetic material of living organisms, including its presence in chromosomes, mitochondria and chloroplasts. Some viruses use RNA as genetic material, although viruses are not considered living organisms.

Exam points

State that DNA is the genetic material of living organisms and occurs in chromosomes, mitochondria and chloroplasts.
Recognise that some viruses use RNA as genetic material and are not considered living organisms.

[Maximum number: 1]

The image shows the results of Griffith's experiment with S and R strains of Streptococcus pneumoniae in mice (Mus musculus).

Figure for Question IB Biology SL A1.2.1 Dna As Genetic Material Questions question 1 — IB Biology SL

What is an explanation for the results?

Mice vary in their resistance to bacteria.

The R strain and S strain mated.

R strain bacteria are more heat-stable than S strain.

DNA was transferred from heat-killed S cells to R cells.

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IB Biology SL A1.2.1 Dna As Genetic Material Questions question 1