DP Biology (last assessment 2024)

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Question 23M.2.SL.TZ2.a

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Date May 2023 Marks available [Maximum mark: 2] Reference code 23M.2.SL.TZ2.a
Level SL Paper 2 Time zone TZ2
Command term Describe Question number a Adapted from N/A
a.
[Maximum mark: 2]
23M.2.SL.TZ2.a

Using the data in the stacked column graph, describe the features that characterize the B2 enterotype.

[2]

Markscheme
  1. nearly half is Bacteroides / more Bacteroides (than other enterotypes);
  2. few Prevotella/fewer Prevotella than in P and R
    OR
    less Faecalibacterium than other enterotypes
    OR
    Ruminococcus is the lowest in B2;
  3. only 40 % other taxa / fewer other taxa (than other enterotypes) / less overall diversity (of taxa);

 

Examiners report

Many were confused by the stacked graph. Weaker candidates just stated the figures from the graph, with better candidates stating that almost half was Bacteroides, and there were only 40% other taxa. 

Syllabus sections