Which of the following is a microorganism that contains organelles?

• A. Bacillus subtilis
• B. Escherichia coli
• C. Amoeba
• D. Staphylococcus aureus

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the definition of a microorganism and organelles. Microorganisms are microscopic organisms, which can be prokaryotic or eukaryotic. Organelles are specialized structures within cells that perform distinct functions, typically found in eukaryotic cells.
2. Step 2: Identify the types of microorganisms listed. Bacillus subtilis, Escherichia coli, and Staphylococcus aureus are all bacteria, which are prokaryotic microorganisms. Amoeba is a eukaryotic microorganism, specifically a protozoan.
3. Step 3: Recall that prokaryotic cells (bacteria) lack membrane-bound organelles such as a nucleus, mitochondria, or chloroplasts, whereas eukaryotic cells (like Amoeba) contain these organelles.
4. Step 4: Compare the options based on cellular structure. Since Bacillus subtilis, Escherichia coli, and Staphylococcus aureus are prokaryotes without organelles, and Amoeba is a eukaryote with organelles, Amoeba is the microorganism that contains organelles.
5. Step 5: Conclude that the correct answer is Amoeba because it is a eukaryotic microorganism possessing membrane-bound organelles, unlike the bacterial options.