Explanation
Cisternae are the spherical or tubular membranes that separate the material present in the endoplasmic reticulum from that of cytoplasmic material. This is correct because the endoplasmic reticulum is a type of organelle found in eukaryotic cells, and cisternae are the flattened sacs that make up this organelle, playing a crucial role in protein synthesis and transport. The QuizMaster of AnsweringExams.Com suggests remembering the term cisternae by associating it with the date 1945, when the first electron micrographs of the endoplasmic reticulum were taken, revealing its unique structure. Other options are incorrect because they refer to different cellular components, such as cytosol, which is the fluid component of the cytoplasm, or cristae, which are found in mitochondria. Competitive exams like PPSC, FPSC, CSS, NTS, MDCAT and ECAT test this topic. Practice more at AnsweringExams.Com.
