Home / iGCSE Biology (0610)-16.6 Sexually transmitted infections – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-16.6 Sexually transmitted infections – iGCSE Style Questions Paper 1

Question

What is HIV?
A) a bacterium
B) an enzyme
C) a pathogen
D) an antibody

▶️ Answer/Explanation
Solution

Ans: C

HIV (Human Immunodeficiency Virus) is classified as a pathogen (C) because it is a disease-causing agent—specifically, a virus that attacks the immune system.

It is not a bacterium (A), enzyme (B), or antibody (D), as these are unrelated biological entities. Hence, the correct answer is C (a pathogen).

Question

Some ways that diseases can be transmitted are listed.

  1. airborne droplets
  2. blood and needles
  3. food and drink
  4. unprotected sex

which ways can transmit HIV?

A) 1 and 3
B) 1 only
C) 2 and 4
D) 4 only

▶️ Answer/Explanation
Solution

Ans: C

HIV is transmitted through specific body fluids:

  • 2. Blood and needles: Direct blood contact or contaminated needles can transmit HIV.
  • 4. Unprotected sex: Sexual contact allows transmission through semen/vaginal fluids.

HIV cannot be transmitted through airborne droplets (1) or food/drink (3), eliminating options A, B, and D. Thus, C (2 and 4) is correct.

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