The newest 5 of 5 written questions. Open one to see it on the real paper.
Some bacteria are pathogens. State what is meant by a pathogen.
See it on the paper →Table 1.1 shows some methods of transmission. Place ticks (✓) in Table 1.1 to show if each method of transmission is direct contact or indirect. Table 1.1 method of transmission direct contact indirect dirty surfaces (d) Pathogens are transmitted by direct contact or indirectly from one human to another. blood in a cut...
See it on the paper →The body defends itself against pathogens. On Fig. 1.2, draw one straight line from each defence to how it stops pathogens. defence how it stops pathogens acts as chemical barrier, destroying pathogens in food mucus skin acts as physical barrier, stopping entry of pathogens stomach acid produces antibodies white blood...
See it on the paper →MRSA is a strain of bacteria that is resistant to antibiotics. Table 10.1 compares the number of cases of infection caused by MRSA bacteria in one hospital between 1998 and 2008. Table 10.1 year number of cases of infection 1998 3 2000 6 2002 22 2004 109 2006 155 2008 167 Calculate the percentage increase in number of...
See it on the paper →Why does this happen?
See it on the paper →Many candidates did not know this definition. A lot of very confused answers were seen and also some vague ones which were not specific enough to gain credit. Candidates gave ideas about something that’s contagious or that a pathogen is a disease which was insufficient.
— Examiner report, May/June 2025, 0654/33 Q1(c) (Cambridge)
Most could identify that blood from a cut was direct transmission but there was confusion as to whether dirty surfaces and contaminated air were indirect or direct.
— Examiner report, May/June 2025, 0654/33 Q1(d) (Cambridge)
Most candidates connected all the boxes correctly. Where candidates did make a mistake, they often thought white blood cells trap pathogens and mucus produces antibodies.
— Examiner report, May/June 2025, 0654/33 Q1(e) (Cambridge)
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