Negatively charged molecules that are partially responsible for the negative charge of the gram- positive bacterial cell surface are
A) teichoic acids.
B) peptide interbridges.
C) phospholipids.
D) diaminopimelic acids.

Question

Quizplus · Accepted Answer

Teichoic acids are negatively charged polymers found in the cell walls of gram-positive bacteria. They contribute to the negative charge of the cell surface by ionizing at physiological pH and attracting cations. Peptide interbridges and diaminopimelic acids are components of the peptidoglycan layer in bacterial cell walls, but they do not contribute to the negative charge. Phospholipids are part of the bacterial cytoplasmic membrane, but they are not specific to gram-positive bacteria and they do not contribute significantly to the negative charge of the cell surface.

Negatively Charged Molecules That Are Partially Responsible for the Negative