Biology 9700 · AS & A Level · Antibiotics

Antibiotics — practice question

Antibiotics are medicines that are essential in treating and curing some diseases.
(a)[1]

Underline the disease or diseases from the list below that can be treated with antibiotics. cholera malaria HIV/AIDS tuberculosis (TB)

(b)[3]

When patients are prescribed a course of antibiotics, they must not stop taking the antibiotics as soon as they start to feel better, or when they feel that the disease symptoms have gone. Explain the importance of completing a full course of antibiotics.

(c(i))[3]

Some antibiotics work as competitive inhibitors of enzymes in pathogens. Describe what is meant by the term competitive inhibitor.

(c(ii))[1]

Penicillin competitively inhibits one of the enzymes involved in bacterial cell wall synthesis. State why penicillin, which is an enzyme inhibitor, can be taken by humans.

(c(iii))[3]

Suggest the effect which penicillin will have on bacterial cells.

Worked solution & mark scheme

This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correct bacterial disease examples: cholera and TB

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