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Chapter 7 Practice Paper: Communicable diseases and defences — question paper

QuizQuipPractice Series
QQ/GCSE-BIO/CH7

GCSE (9–1) · GCSE Biology (Foundation and Higher)

Chapter 7 Practice Paper

Communicable diseases and defences

Duration: 40 minutes
Total: 30 marks
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READ THESE INSTRUCTIONS FIRST

  • Answer all questions.
  • Section A contains ten multiple-choice questions. Choose one answer, A, B, C or D, for each.
  • Section B contains structured questions. Write your answers in the spaces provided.
  • You may use a calculator.
  • The number of marks is given in brackets [ ] at the end of each question or part question.
  • The total mark for this paper is 30.

Original practice material written for the MOE GCSE Biology syllabus. It is not an official MOE or school examination paper. Chapter 7: pathogens and spread, the GCSE disease set (measles, HIV, TMV, salmonella, gonorrhoea, malaria, rose black spot), nonspecific defences, the immune response, vaccination and herd immunity, antibiotics and resistance, and drug discovery, trials and testing.

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose one answer for each question. Each question is worth 1 mark.

  1. 1

    Which pathogen type causes rose black spot?

    1. Avirus
    2. Bbacterium
    3. Cprotist
    4. Dfungus
    ( )
  2. 2

    HIV is transmitted by

    1. Asexual contact or exchange of body fluids
    2. Binhaling droplets
    3. Ceating undercooked poultry
    4. Dwind-blown spores
    ( )
  3. 3

    TMV stunts plant growth because it damages

    1. Athe waxy cuticle
    2. Bchloroplasts
    3. Croot hairs
    4. Dguard cells
    ( )
  4. 4

    Which disease spreads through undercooked poultry?

    1. Agonorrhoea
    2. Bmalaria
    3. Csalmonella
    4. DTMV
    ( )
  5. 5

    Gonorrhoea became harder to treat because

    1. Ait mutated into a virus
    2. Bpenicillin-resistant strains became common
    3. Cit now spreads by droplets
    4. Dit infects red blood cells
    ( )
  6. 6

    Which barrier kills pathogens using acid?

    1. Athe skin
    2. Bthe nose
    3. Cthe trachea
    4. Dthe stomach
    ( )
  7. 7

    Antibodies are produced by

    1. Alymphocytes
    2. Bphagocytes
    3. Cplatelets
    4. Dred blood cells
    ( )
  8. 8

    A vaccine works because it

    1. Akills pathogens already in the blood
    2. Bcontains antibodies that last for life
    3. Ctrains memory lymphocytes safely
    4. Dstrengthens stomach acid
    ( )
  9. 9

    Cases fell from 1200 to 180 after a campaign. The percentage fall is

    1. A15%
    2. B85%
    3. C102%
    4. D180%
    ( )
  10. 10

    A placebo is used in a trial so that

    1. Adoctors can give sugar freely
    2. Bpatients get a backup cure
    3. Cimprovement can be compared with expectation alone
    4. Dthe trial finishes faster
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 11

    Match each disease to its pathogen type and one control measure.

    1. (a)

      Malaria.

      [2]
    2. (b)

      Salmonella.

      [2]
    3. (c)

      Measles.

      [2]
  2. 12

    A student describes the body’s defences.

    1. (a)

      Name two nonspecific defences and state what each does.

      [4]
    2. (b)

      State what makes these defences “nonspecific”.

      [1]
  3. 13

    A country records 1200 measles cases in a year. After a catch-up vaccination campaign the next year, cases fall by 85%.

    1. (a)

      Calculate how many cases were recorded the next year.

      [2]
    2. (b)

      Explain how the campaign could also protect children who were not vaccinated.

      [2]
  4. 14

    This question is about antibiotics and resistance.

    1. (a)

      Explain why antibiotics cannot treat influenza.

      [2]
    2. (b)

      Explain how overuse of antibiotics leads to resistant strains.

      [3]

— End of paper —