Biology B (Advancing Biology) H022: Pathogenic microorganisms Topical Past Paper Questions
OCR AS Biology B (Advancing Biology) (H022) past-paper questions on Pathogenic microorganisms, free. This topic is frequently examined across 4 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Some of the stages of the Gram staining method used for identifying bacteria are shown below. 1 A counterstain, safranin, is added to the microscope slide. 2 A small sample of bacterial culture is spread on the microscope slide. 3 A stain, crystal violet, is added to the microsco…
It is estimated that 100000 people in the UK carry the Human Immunodeficiency Virus (HIV). Fic ' 'w/ Fig. 4.1 (a) (i) State the roles of the following structures. M ..... [2] (ii) Identify molecule P. P ..... [1] (b)* The UK has tried to control the spread of HIV since its discov…
Water is an important biological molecule. (a) The table below shows some of the properties of water and their importance to living organisms. Complete the table using the most appropriate term(s) or sentence(s). (b) Water also plays an important role in the reactions involved in…
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