Photo AI
Some plant extracts contain natural antiseptics - Edexcel - GCSE Biology - Question 3 - 2014 - Paper 1
Question 3
Some plant extracts contain natural antiseptics. A scientist spread bacteria on an agar plate. She then soaked a paper disc in a plant extract and placed the disc ... show full transcript
Worked Solution & Example Answer:Some plant extracts contain natural antiseptics - Edexcel - GCSE Biology - Question 3 - 2014 - Paper 1
Step 1
Suggest why there is no bacterial growth around the paper disc.
Answer
The area around the paper disc does not exhibit any bacterial growth because the plant extract soaked into the disc has antibacterial properties that inhibit the growth of bacteria. This means that the extract is acting as an antiseptic, effectively killing the bacteria or preventing their proliferation in that area.