Final answer:
In prokaryotes, it is true that they lack membrane-bound organelles. Prokaryotic cells have a cell membrane and ribosomes but do not have a nucleus or other membrane-bound structures like mitochondria or endoplasmic reticulum.
Step-by-step explanation:
In prokaryotes, d) They lack membrane-bound organelles is true. Unlike eukaryotic cells, prokaryotic cells do not have a nucleus. Instead, their DNA is contained within a region called the nucleoid. Additionally, prokaryotic cells, which include bacteria and cyanobacteria among others, do not possess organelles such as mitochondria, chloroplasts, and endoplasmic reticulum that are typically found in eukaryotes and bound by membranes.
It is important to note that prokaryotic cells do have a cell membrane, known as a plasma membrane, which encloses the cell and separates its interior from the external environment. They also contain ribosomes, which are critical for protein synthesis. These ribosomes are not enclosed by a membrane and are therefore not considered membrane-bound organelles. Furthermore, many prokaryotic cells feature a cell wall that provides structure and protection, but this too is not a membrane-bound structure.