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Bacteria can get into deep wounds in the skin and cause infection - OCR Gateway - GCSE Biology - Question 12 - 2023 - Paper 1
Question 12
Bacteria can get into deep wounds in the skin and cause infection. There is little oxygen in these wounds. How will a lack of oxygen affect the type of bacteria in ... show full transcript
Worked Solution & Example Answer:Bacteria can get into deep wounds in the skin and cause infection - OCR Gateway - GCSE Biology - Question 12 - 2023 - Paper 1
Step 1
A) Bacteria that respire using anaerobic respiration will be present.
Answer
A lack of oxygen in deep wounds creates an anaerobic environment. As a result, bacteria that can thrive in such conditions, specifically those that utilize anaerobic respiration, will be predominant. These bacteria can survive where oxygen levels are low and can utilize fermentation or anaerobic cellular respiration.
Step 2
B) Most bacteria will respire aerobically and some will respire anaerobically.
Answer
In an anaerobic environment, it is unlikely that most bacteria will respire aerobically, as their survival depends on the presence of oxygen. While some bacteria may still be capable of anaerobic respiration, the statement misrepresents the environment created by the lack of oxygen.
Step 3
C) Only bacteria that respire using aerobic respiration will be present.
Answer
This statement is incorrect because the lack of oxygen precludes aerobic respiration. Therefore, bacteria that rely solely on aerobic respiration will not survive in such an environment, making this statement false.
Step 4