Question

Which of the following statements are incorrect about penicillin?
A. An antibacterial fungus
B. Ampicillin is its synthetic modification
C. It has bacteriostatic effect
D. It is a broad spectrum antibiotic

Answer 1

Hint: We have to know that the penicillin was discovered by Alexander Fleming. Penicillin is used as a drug in the field of antibiotic medicines and it is due to inhibition of metabolic functions necessary for the bacterial cell wall. Today also this medicine is used effectively as an antibiotic. But people report that they are allergic to penicillin.

Complete step by step answer:
Let us see the options one by one to find the answer.
Penicillin extracted from antibacterial fungus penicillium
We have to know that the Penicillin produced by the fungus has created a zone of growth inhibition of the bacterium. Penicillin was identified as penicillium notatum, because the fungal contaminant. So this substance was named penicillin. Therefore, the option A is incorrect.
Ampicillin is its synthetic modification of penicillin
Ampicillin is a widely used antibiotic. Semi synthetic modification of penicillin is known as ampicillin. It inhibits the growth of both gram positive and negative bacteria. Therefore, the option B is incorrect.
It has bacteriostatic effect
We need to know that the bacteriostatic agent is used to stop bacteria from reproducing. Whereas Penicillin has a bactericide effect.Therefore, the option C is incorrect.
It does not a broad spectrum antibiotic
Antibiotics, which are effective against both gram-positive and gram-negative bacteria are termed as broad spectrum antibiotics. But penicillin is effective mainly against gram-positive bacteria.
So from the above information penicillin does not have a broad spectrum antibiotic.

So, the correct answer is Option D.

Note: We have to remember that the penicillin is used for infections, pneumonia, acute bronchitis, and bronchopneumonia. It is also used for urinary tract infections due to streptococcus pyogenes, bacterial endocarditis, meningitis, gonorrhea and syphilis. Penicillin present source from penicillium chrysogenum.