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5.1 Health and communicable disease

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Question 6

A scientist considers four possible sets of results from cultures of algal cells infected with a virus.

resultnumber of intact algal cellsnumber of virus particles outside the algal cells
Pdoes not changeincreases
Qdecreasesdoes not change
Rdoes not changedoes not change
Sdecreasesincreases

What happens when the virus completes the lytic pathway?

[1]
A

the changes shown in result Q

B

the changes shown in result S

C

the changes shown in result P

D

the changes shown in result R

Markscheme

5.1 Health and communicable disease Questions

  1. GCSE
  2. /Biology
  3. /5.1 Health and communicable disease

112 exam-style questions on Edexcel GCSE Biology 5.1 Health and communicable disease, covering 5.1.1 Communicable and non-communicable diseases, 5.1.2 Disease susceptibility interactions, 5.1.3 Pathogens as disease-causing organisms, 5.1.4 Common infections, 5.1.5 Spread and prevention of pathogens, 5.1.6 Lifecycle of a virus, and 5.1.7 Spread and prevention of STIs. Each one has a worked solution and a mark scheme showing where the marks go.

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