Which of the following is not true of sulfonamides?

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Drugs and the immune system Questions

Question 1 of 5

Which of the following is not true of sulfonamides?

A. They are primarily metabolized by acetylation B. They are more likely to produce crystalluria in alkaline urine in which they are less soluble C. They may exert bactericidal action in the urinary tract D. Used alone, they have become therapeutically unreliable for serious infections

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

Penicillins interfere with bacterial cell wall synthesis by

A. Inhibiting synthesis of N-acetyl muramic acid pentapeptide B. Inhibiting conjugation between N-acetyl muramic acid and N-acetyl glucosamine C. Inhibiting transpeptidases and carboxy peptidases which cross-link the peptidoglycan residues D. Counterfeiting for D-alanine in the bacterial cell wall

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

If a patient gives history of urticaria, itching and swelling of lips following injection of penicillin G, then

A. He will develop similar reaction whenever penicillin is injected B. He can be given ampicillin safely C. He can be given oral phenoxymethyl penicillin safely D. All natural and semisynthetic penicillins are contraindicated for him

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 4 of 5

Cloxacillin is indicated in infections caused by the following organism(s)

A. Staphylococci B. Streptococci C. Gonococci D. All of the above

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 5 of 5

Clavulanic acid is combined with amoxicillin because

A. It kills bacteria that are not killed by amoxicillin B. It reduces renal clearance of amoxicillin C. It counteracts the adverse effects of amoxicillin D. It inhibits beta lactamases that destroy amoxicillin

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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