DP Biology (first assessment 2025)

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Question 23M.1A.SL.TZ1.12

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ1.12
Level SL Paper 1A Time zone TZ1
Command term Question number 12 Adapted from N/A
12.
[Maximum mark: 1]
23M.1A.SL.TZ1.12

The scattergraph shows the genome sizes of four Enterococcus species.

[Source: Lebreton, F., Manson, A.L., Saavedra, J.T., Straub, T.J., Earl, A.M. and Gilmore, M.S., 2017.
Tracing the Enterococci from Paleozoic Origins to the Hospital (Figure 1A).
Cell, [e-journal] 169(5), pp. 849–861. http://dx.doi.org/10.1016/j. cell.2017.04.027.]

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. columbae has more DNA than E. faecium.

[1]

Markscheme

A

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