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.
- airborne droplets
- blood and needles
- food and drink
- 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.