Question

in figure which diagram of a cell wall contains teichoic acids?
a a
b both a and b
c b
d neither a nor b

Explanation:

Teichoic acids are found in the cell - walls of Gram - positive bacteria. The cell - wall in diagram a appears to be a Gram - positive cell - wall structure (thicker peptidoglycan layer), while diagram b appears to be a Gram - negative cell - wall structure (thinner peptidoglycan layer with an outer membrane). So, teichoic acids are in the cell - wall of diagram a.

Answer:

A. a