Igcse Model Questions Vol1 2024 Biology Question 2

Practice objective / multiple choice question 2 from the 2024 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2024 Biology Objective / Multiple Choice Hard Difficulty
Question 2 IGCSE_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • objective

In a community, 5 % of bacterial strains are resistant to a certain antibiotic. Respiratory infections are bacterial in 80 % of cases; the remaining 20 % are viral and do not respond to antibiotics. Antibiotic A cures 90 % of infections caused by non‑resistant bacteria and is ineffective against resistant strains. Antibiotic B cures 70 % of non‑resistant infections and 50 % of resistant infections. Assuming each patient receives only one antibiotic, calculate the overall cure rate (as a percentage) for each antibiotic and state which antibiotic gives the higher expected cure rate.

Answer Options

A. Antibiotic A: 68.4 %; Antibiotic B: 55.2 %; Antibiotic B gives the higher cure rate
Correct Answer B. Antibiotic A: 68.4 %; Antibiotic B: 55.2 %; Antibiotic A gives the higher cure rate
C. Antibiotic A: 65.0 %; Antibiotic B: 60.0 %; Antibiotic A gives the higher cure rate
D. Antibiotic A: 70.2 %; Antibiotic B: 58.0 %; Antibiotic A gives the higher cure rate
Correct Answer
B
Correct Option:
Antibiotic A: 68.4 %; Antibiotic B: 55.2 %; Antibiotic A gives the higher cure rate

About This Question

This is Igcse Model Questions Vol1 2024 Biology Question 2. It is one of the objective questions from the 2024 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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