Investigating antibiotics & antiseptics (Edexcel GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does comparing inhibition zone sizes tell us?
What does comparing inhibition zone sizes tell us?
Effectiveness of antibiotics
Which formula quantifies the effectiveness of antibiotics using inhibition zones?
Which formula quantifies the effectiveness of antibiotics using inhibition zones?
What value of should be used in these calculations?
What value of should be used in these calculations?
3.14
How do you obtain the radius from the diameter of an inhibition zone?
How do you obtain the radius from the diameter of an inhibition zone?
Divide by 2
What is the area of an inhibition zone with diameter 10 mm?
What is the area of an inhibition zone with diameter 10 mm?
78.5 mm²
What does a larger inhibition zone indicate?
What does a larger inhibition zone indicate?
More bacteria killed
If antibiotic A has a larger inhibition zone than B, what does this mean?
If antibiotic A has a larger inhibition zone than B, what does this mean?
A is more effective
What should you measure first to calculate inhibition zone area?
What should you measure first to calculate inhibition zone area?
The diameter
What is the area of an inhibition zone with radius 6 mm?
What is the area of an inhibition zone with radius 6 mm?
113.04 mm²
What can be compared using inhibition zones?
What can be compared using inhibition zones?
Antibiotics, antiseptics or plant extracts