Question 1

What is the difference between an infectious disease and a non-infectious disease in 9700 Biology?

Accepted Answer

An infectious disease, covered extensively in our free Cambridge 9700 Biology course, is caused by a pathogen and can be transmitted between hosts (e.g., influenza, malaria). A non-infectious disease is not caused by a pathogen and cannot be transmitted; it often results from genetics, lifestyle, or environmental factors (e.g., diabetes, heart disease). Mastering these definitions is key for your P1 and P2 exams, especially when tackling past papers.

Question 2

How can I remember the four main types of pathogens for my Cambridge Biology exam?

Accepted Answer

A simple mnemonic might be 'VPFB' – Viruses, Protoctista, Fungi, and Bacteria. Focus on their defining characteristics: Viruses are non-cellular parasites, Bacteria are prokaryotic cells, Protoctista are eukaryotic single cells, and Fungi are eukaryotic with hyphae or as yeasts. Practice differentiating them in exam questions to solidify your understanding.

Question 3

Why is understanding disease transmission so important for preventing outbreaks?

Accepted Answer

Understanding transmission modes is crucial because effective disease control strategies directly target these pathways. If a disease is spread by a vector (like malaria), controlling the vector (e.g., mosquito nets) is vital. If it's water-borne (like cholera), ensuring a clean water supply is the priority. Our revision lessons, coupled with past paper practice, help you link transmission methods to practical prevention measures for optimal exam performance.

Infectious diseases

What you need to know

Infectious diseases