Which of the following is present in a prokaryotic cell? a. mitochondrion b. ribosome c. nuclear envelope d. chloroplast

Prokaryotic cells are simple, unicellular organisms that lack a nucleus and membrane-bound organelles. They are characterized by their small size and the presence of a single circular DNA molecule. Common examples include bacteria and archaea, which thrive in various environments and play crucial roles in ecosystems.

Ribosomes are essential cellular structures responsible for protein synthesis. They can be found in both prokaryotic and eukaryotic cells, and in prokaryotes, they float freely in the cytoplasm. Ribosomes translate messenger RNA (mRNA) into polypeptide chains, which then fold into functional proteins.

Cellular organelles are specialized structures within cells that perform distinct functions. In eukaryotic cells, organelles like mitochondria and chloroplasts are membrane-bound, while prokaryotic cells lack these structures. Understanding the differences in organelle presence helps distinguish between prokaryotic and eukaryotic cells.