IGCSE · Biology 0610 · Reproduction

Sexually transmitted infections: IGCSE Biology questions with answers

Free Sexually transmitted infections questions for IGCSE Biology (0610), part of Reproduction. Each question has the answer and the marking points an examiner would look for.

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Sexually transmitted infections practice questions

Question 1Multiple choice · 1 mark

Which method reduces the spread of sexually transmitted infections?

  1. A vaccination against HIV
  2. B using condoms
  3. C drinking clean water
  4. D taking antibiotics against viruses
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Answer: B

Question 2Multiple choice · 1 mark

Which statement describes sexually transmitted infection?

  1. A Changing the genetic material of an organism by removing, changing or inserting genes
  2. B The change in pupil diameter in response to light intensity
  3. C A nitrogenous waste made in the liver from excess amino acids
  4. D An infection passed on through sexual contact, such as HIV
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Answer: D

Question 3Multiple choice · 1 mark

Which is a sexually transmitted infection caused by a bacterium?

  1. A HIV
  2. B gonorrhoea
  3. C influenza
  4. D measles
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Answer: B

Question 4Multiple choice · 1 mark

What type of pathogen is HIV?

  1. A bacterium
  2. B virus
  3. C fungus
  4. D protoctist
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Answer: B

Question 5Structured · 6 marks

HIV is a sexually transmitted infection.

(a)

Describe two ways in which HIV can be transmitted.

[2]
(b)

Explain how HIV affects the immune system.

[2]
(c)

Suggest two ways of controlling the spread of STIs.

[2]
Show answers and mark scheme
PartAnswer and marking pointsMarks
(a)unprotected sex; shared needles; mother to child
Any 2 of: unprotected sexual intercourse; sharing needles; mother to baby (birth/breastfeeding); blood transfusion B2
2
(b)destroys lymphocytes
HIV infects and destroys lymphocytes B1
the body cannot make enough antibodies, leading to AIDS B1
2
(c)condoms; screening; education
Any 2 of: use of condoms; testing/screening and treatment; education; limiting number of sexual partners B2
2
Question 6Structured · 1 mark

State what is meant by the term sexually transmitted infection.

[1]
Show answers and mark scheme
PartAnswer and marking pointsMarks
An infection passed on through sexual contact, such as HIV
An infection passed on through sexual contact, such as HIV B1
1

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