Which of the following organelles are present in all the bacteria?

Explanation

The correct answer is 'Ribosomes.' In bacteria, which are prokaryotic organisms, ribosomes are present and essential for protein synthesis. These are not membrane-bound and are found throughout the cytoplasm. Other options such as Golgi bodies, mitochondria, and chloroplasts are membrane-bound organelles found in eukaryotic cells, not in bacteria. Mesosomes were once thought to be a common organelle in bacteria, but they are now largely considered artifacts of cell preparation.