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Doctors Medicines MCQs Q&A

A certain antibiotic X is effective only against a few types of harmful microbes and cells. X is a _______ antibiotic.

A certain antibiotic X is effective only against a few types of harmful microbes and cells. X is a _______ antibiotic. Correct Answer narrow spectrum

Antibiotics are classified based on the range of microbes that are affected by it. Broad spectrum antibiotics affect Gram-positive as well as Gram-negative bacteria. Narrow spectrum are used only against either Gram-positive or Gram-negative bacteria, whereas limited spectrum antibiotics kill or inhibit only one particular organism.

Related Questions

Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.
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A bacterial culture (200 μL containing 1.8 × 109 cells) was treated with an antibiotic Z (50 μg per mL) for 4 h at 37°C. After this treatment, the culture was divided into two equal aliquots.
Set A: 100 μL was plated on Luria agar.
Set B: 100 μL was centrifuged, the cell pellet washed and plated on Luria agar.
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