You have discovered a new coccoid-shaped microorganism with no nucleus, a rigid cell wall, and a diameter of 2 μm. Chemical tests reveal that its cell wall does NOT contain peptidoglycan. The new microorganism is
A) most likely a bacterium.
B) most likely a eukaryote.
C) most likely an archaeon.
D) either a bacterium or an archaeon.

Question

Quizplus · Accepted Answer

The lack of peptidoglycan in the cell wall suggests that this microorganism is not a bacterium. Instead, it could be an archaeon or a eukaryote. However, the presence of a rigid cell wall and the absence of a nucleus suggest that it is more likely to be an archaeon.

You Have Discovered a New Coccoid-Shaped Microorganism with No Nucleus