Question

which statement about peptidoglycan is true? it is present in larger amounts in the cell walls of gram - negative bacteria than in the cell walls of gram - positive bacteria. it is present in the cell walls of almost all bacteria. it is present in the cell walls of yeasts. it is present in the cell walls of archaea. its synthesis is unaffected by penicillin.

Explanation:

Peptidoglycan is a major component of bacterial cell - walls. Penicillin targets peptidoglycan synthesis in bacteria. Archaea do not have peptidoglycan in their cell - walls. Yeasts have cell - walls made of other components like glucans and chitin. Gram - positive bacteria have a thick layer of peptidoglycan in their cell - walls, while Gram - negative bacteria have a thin layer of peptidoglycan between an inner and outer membrane. The synthesis of peptidoglycan in bacteria is affected by penicillin.

Answer:

It is present in the cell walls of almost all bacteria.