An antibiotic is
A. a chemical synthesised by a human cell against an microorganism
B. a chemical synthesised by a microorganism against another microorganisms
C. a substance produced by blood cells against bacteria
D. a substance produced by blood cells against infection
Answer: Option B
Related Questions on Human Diseases
Which one of the following is useful in the treatment of scurvy disease?
A. Mango
B. Papaya
C. Aonia
D. Ber

Join The Discussion