Biology CLEP Prep Practice Exam

Bacteria do not contain membrane-bound organelles because they are prokaryotic cells. This means that they do not have a defined nucleus or other membrane-bound structures like mitochondria, endoplasmic reticulum, or Golgi apparatus. Instead, their DNA floats freely in the cytoplasm and they have specialized structures like ribosomes for protein synthesis. On the other hand, plant, fungi, and animal cells are all eukaryotic cells, which have a defined nucleus and other membrane-bound organelles for specific functions. While they may have some differences in their organelles and cell structures, they all share the feature of having these membrane-bound structures. Therefore, options B, C, and D are incorrect.