Which of the following statements is not correct about penicillium ?

Options

A. Penicillin G has a narrow spectrum.
B. It is extracted from antibacterial fungus Penicillium.
C. Ampicillin and amoxycillin are synthetic modifications of penicillins.
D. It has bacteriostatic effect.

Explanation

To determine which statement about penicillin is not correct, let's analyze each option step by step:

1. **Statement A: Penicillin G has a narrow spectrum.**
- Penicillin G is known to have a narrow spectrum of activity, primarily effective against certain gram-positive bacteria and some gram-negative bacteria. It is commonly used to treat infections like sore throat and rheumatic fever.
- **Conclusion:** This statement is correct.

2. **Statement B: It is extracted from antibacterial fungus penicillium.**
- Penicillin was indeed first discovered and extracted from the mold Penicillium notatum. This mold produces penicillin, which is an antibiotic effective against bacteria.
- **Conclusion:** This statement is also correct.

3. **Statement C: Ampicillin and amoxicillin are synthetic modifications of penicillin.**
- Ampicillin and amoxicillin are indeed derivatives of penicillin. They are modified forms that have been chemically altered to enhance their effectiveness and spectrum of activity.
- **Conclusion:** This statement is correct as well.

4. **Statement D: It has a bacteriostatic effect.**
- Penicillin is classified as a bactericidal antibiotic, meaning it kills bacteria rather than merely inhibiting their growth (which would be bacteriostatic). Therefore, this statement is incorrect.
- **Conclusion:** This statement is not correct.

Based on the analysis, the statement that is not correct about penicillin is **Statement D**: "It has a bacteriostatic effect."

### Summary of the Solution:
- **Correct Answer:** Statement D is not correct because penicillin has a bactericidal effect, not a bacteriostatic effect.