Which types of microorganisms have cells that do not contain membrane-bound organelles?

• A. Bacteria
• B. Fungi
• C. Algae
• D. Protozoa

Answer: (A)

Verified step by step guidance

1. Understand the key characteristic of cells that lack membrane-bound organelles. These are typically prokaryotic cells, which do not have structures like a nucleus, mitochondria, or endoplasmic reticulum enclosed by membranes.
2. Recall the classification of microorganisms: Bacteria and Archaea are prokaryotes, while Fungi, Algae, and Protozoa are eukaryotes.
3. Identify that Bacteria are prokaryotic microorganisms, meaning their cells do not contain membrane-bound organelles.
4. Recognize that Fungi, Algae, and Protozoa are eukaryotic microorganisms, which have cells with membrane-bound organelles such as nuclei and mitochondria.
5. Conclude that among the given options, only Bacteria have cells without membrane-bound organelles.