Bacteria are widely diverse in their cell structure, metabolism, and ecological adaptations, but share some major common traits. Which of the following statements is NOT true?
A) They share common features in central apparatus for gene expression and translation.
B) Bacterial gene expression mechanisms differ from those of the eukaryotes, which underlies the selective activity of many antibiotics.
C) Some archaeal cell walls are composed of pseudopeptidoglycan and may have fundamentally different antibiotic sensitivity than bacteria.
D) Mycoplasmas contain abnormal peptidoglycans and are thus not susceptible to antibiotics.
E) In bacteria, variant forms of peptidoglycan distinguish different species.

Question

Quizplus · Accepted Answer

Explanation: Mycoplasmas are a group of bacteria that lack a cell wall, not that they contain abnormal peptidoglycans. The absence of a cell wall makes them naturally resistant to antibiotics that target cell wall synthesis, such as beta-lactams. The statement in D is incorrect because it inaccurately describes the nature of mycoplasmas in relation to peptidoglycan and antibiotic susceptibility.

Bacteria Are Widely Diverse in Their Cell Structure, Metabolism, and Ecological