1. B3 content – Infection and Response (Paper 1)
Pathogens and Disease (pathogens, viral, bacterial, protists, fungal)
Human defences against disease (preventing entry, immune system, boosting immunity)
Treating diseases (Antibiotics, developing new drugs, monoclonal antibodies [HT])
Plant disease (Identifying plant disease [HT], Plant diseases, plant defences)
Required practicals:
Investigating the effect of different antibiotics/disinfectants on bacterial growth (page 38 in revision guide)

2. B3 Revision – Infection and Response (page 34-41 in revision guide)
What is a vector?
State on precaution that can stop pathogens being spread by droplets in the air.
Why should leaves infected with rose black spot be removed and burned?
Explain how a vaccination works to build immunity
What does double blind trail mean?
Explain why a change in leaf colour caused by TMV can reduce photosynthesis.
How does the stomach help to kill pathogens?
Explain what phagocytosis is.
KEY WORDS:
Pathogen
Vector
Toxin
Immune
Phagocytosis
Antibody
Antigen
Antitoxin
Immunity
Vaccination
Antibiotics
MRSA
Digitalis
Aspirin
Double-blind
Placebo
TMV
Aphid
Mimicry