Penicillin and related drugs act on the cell nucleus and are especially useful in controlling gram-negative viruses the cell nucleus and are especially useful in controlling gram-positive viruses the cell wall and are especially useful in controlling gram-negative bacteria the cell wall and are especially useful in controlling gram-positive bacteria

the cell wall and are especially useful in controlling gram-positive bacteria

Penicillin is a group of drug/antibiotic that works by inhibiting the formation of cross-link of the peptidoglycan. Peptidoglycan is a protein that commonly found in bacteria cell wall, but it was much thicker in gram-positive bacteria. Since the drug disrupt the production of material that responsible for cell wall, it will weaken the membrane and induce lysis.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.