Which of the following structures is present in prokaryotic cells?

• A. Ribosomes
• B. Nucleus
• C. Mitochondria
• D. Endoplasmic Reticulum

Answer: (A)

Verified step by step guidance

1. Understand the basic structure of prokaryotic cells: Prokaryotic cells are simpler than eukaryotic cells and lack membrane-bound organelles.
2. Identify the structures listed in the options: Ribosomes, Nucleus, Mitochondria, and Endoplasmic Reticulum.
3. Recall that prokaryotic cells do not have a nucleus; their genetic material is not enclosed within a membrane.
4. Recognize that mitochondria and endoplasmic reticulum are membrane-bound organelles, which are absent in prokaryotic cells.
5. Note that ribosomes are present in both prokaryotic and eukaryotic cells, as they are essential for protein synthesis and are not membrane-bound.