Question

multiple choice question
mycoplasmas are different from other bacteria in that they ______.

• have mitochondria
• lack a cell wall
• have 80s ribosomes
• lack phospholipid membranes

Explanation:

• Bacteria are prokaryotes. Prokaryotes generally do not have mitochondria (so "have mitochondria" is incorrect).
• Most bacteria have a cell wall, but mycoplasmas are unique among bacteria as they lack a cell wall.
• Bacteria have 70S ribosomes, while eukaryotes have 80S ribosomes, so "have 80S ribosomes" is incorrect.
• All bacteria (including mycoplasmas) have a phospholipid membrane (so "lack phospholipid membranes" is incorrect).

Answer:

B. lack a cell wall