SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A bacterial population with no resistance could develop into a bacterial population with some resistance to an antibiotic. Which event could lead to this?
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Antibiotic resistance was inherited from an ancestral population
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An antibiotic resistance plasmid is received from a bacterium in another population
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The enzyme needed for antibiotic resistance is received from a bacterium in another population
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The bacteria have mutated in response to antibiotics in the environment
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Explanation:
Detailed explanation-1: -Plasmids can transfer between different bacteria Plasmids also often have mechanisms for transfer of the whole plasmid to other bacteria. This means that a bacterium can become resistant to multiple antibiotics at once by picking up a single plasmid. They then become multidrug-resistant.
Detailed explanation-2: -Resistant bacteria continue to multiple, even when exposed to antibiotics; Horizontal Gene Transfer – Antibiotic-resistant genetic material is transferred between different bacteria cells. This can happen in three different ways: transformation, transduction or conjugation.
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