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SCIPAD - BIG IDEAS - BOOK 2
LIFE OF MICROBES
5. Complete the table by drawing the four main stages of viral reproduction.
The virus attaches to the
host cell.
It injects its genetic
material into the cell.
It causes the cell to
produce components for
new viruses.
The viruses burst out of
the cell to infect other
cells.
6. (a) Define the term 'pathogen'. 

(b) State 3 ways pathogens can be transmitted to a new host.
		 (i) 
		 (ii) 
		 (iii) 
7. (a) State which type of microbes produce antibiotics. 

(b) Outline why they produce these chemicals. 


(c) Describe how microbes can become resistant to antibiotics. 









8. Explain how vaccines lead to immunity against viral infections. 









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