Which of the Following is NOT a Common Feature in Many

Question

Which of the following is NOT a common feature in many spirochetes?
A) tight spiral morphology
B) heterotrophy
C) thick outer sheaths
D) periplasmic flagella
E) rigid cell walls

Accepted Answer

Spirochetes are known for their spiral morphologies and several species have thick outer sheaths and periplasmic flagella for motility. Most spirochetes lack a rigid cell wall, which allows for their flexibility and movement, but this is not a universal feature as some spirochetes do have a more rigid peptidoglycan layer. Heterotrophy, or the ability to obtain nutrients from organic compounds, is also common among spirochetes. Therefore, the incorrect choice is E, which describes a feature that is not typically found in spirochetes.