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Date May 2017 Marks available 1 Reference code 17M.1.SL.TZ2.27
Level Standard level Paper Paper 1 Time zone Time zone 2
Command term Question number 27 Adapted from N/A

Question

The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive system. The graph shows the percentage of samples in which this bacterium showed resistance to six antibiotics over a period of ten years.

What is a possible explanation for the total percentage resistance being larger than 100% in 2010?

A. People do not take the antibiotics as prescribed.

B. More people have been sampled in that year.

C. There was an epidemic of Neisseria gonorrhoeae in that year.

D. Some bacteria are resistant to more than one antibiotic.

Markscheme

D

Examiners report

[N/A]

Syllabus sections

Core » Topic 4: Ecology » 4.1 Species, communities and ecosystems
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Core » Topic 5: Evolution and biodiversity » 5.1 Evidence for evolution
Core » Topic 2: Molecular biology » 2.1 Molecules to metabolism
Core » Topic 3: Genetics » 3.1 Genes
Core » Topic 1: Cell biology » 1.1 Introduction to cells
Core » Topic 6: Human physiology » 6.1 Digestion and absorption
Core » Topic 3: Genetics » 3.2 Chromosomes
Core » Topic 6: Human physiology » 6.2 The blood system
Core » Topic 5: Evolution and biodiversity » 5.2 Natural selection
Core » Topic 4: Ecology » 4.2 Energy flow
Core » Topic 2: Molecular biology » 2.2 Water
Core » Topic 1: Cell biology » 1.2 Ultrastructure of cells
Core » Topic 1: Cell biology » 1.3 Membrane structure
Core » Topic 3: Genetics » 3.3 Meiosis
Core » Topic 4: Ecology » 4.3 Carbon cycling
Core » Topic 2: Molecular biology » 2.3 Carbohydrates and lipids
Core » Topic 5: Evolution and biodiversity » 5.3 Classification of biodiversity
Core » Topic 6: Human physiology » 6.3 Defence against infectious disease
Core » Topic 2: Molecular biology » 2.4 Proteins
Core » Topic 5: Evolution and biodiversity » 5.4 Cladistics
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Core » Topic 1: Cell biology » 1.4 Membrane transport
Core » Topic 6: Human physiology » 6.4 Gas exchange
Core » Topic 4: Ecology » 4.4 Climate change
Core » Topic 1: Cell biology » 1.5 The origin of cells
Core » Topic 3: Genetics » 3.5 Genetic modification and biotechnology
Core » Topic 6: Human physiology » 6.5 Neurons and synapses
Core » Topic 2: Molecular biology » 2.5 Enzymes
Core » Topic 2: Molecular biology » 2.6 Structure of DNA and RNA
Core » Topic 6: Human physiology » 6.6 Hormones, homeostasis and reproduction
Core » Topic 1: Cell biology » 1.6 Cell division
Core » Topic 2: Molecular biology » 2.7 DNA replication, transcription and translation
Core » Topic 2: Molecular biology » 2.8 Cell respiration
Core » Topic 2: Molecular biology » 2.9 Photosynthesis
Core » Topic 1: Cell biology
Core » Topic 2: Molecular biology
Core » Topic 3: Genetics
Core » Topic 4: Ecology
Core » Topic 5: Evolution and biodiversity
Core » Topic 6: Human physiology
Core

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