Cisternae is found in(a) Only mitochondria(b) Only endoplasmic reticulum(c) Endoplasmic reticulum and Golgi body(d) Only Golgi body

The correct answer is (c) Endoplasmic reticulum and Golgi body.
Cisternae are flattened, membrane-bound sacs that are characteristic structural components of certain cell organelles. They are found in both the endoplasmic reticulum (ER) and the Golgi apparatus (Golgi body).
Details of Cisternae in Organelles:
1. Endoplasmic Reticulum (ER):
o The ER is a network of membranes involved in the synthesis of proteins (rough ER) and lipids (smooth ER).
o The cisternae in the ER are interconnected, forming a continuous network that aids in the transport of substances within the cell.
2. Golgi Body (Golgi Apparatus):
o The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for transport.
o The cisternae in the Golgi are organized into distinct stacks, where each stack has a functional role in processing and trafficking biomolecules.
Why Other Options Are Incorrect:
• (a) Only mitochondria: Mitochondria do not contain cisternae. They have inner membrane folds called cristae, which are different structures.
• (b) Only endoplasmic reticulum: This is partially correct but ignores the presence of cisternae in the Golgi apparatus.
• (d) Only Golgi body: This is also partially correct but excludes the cisternae in the endoplasmic reticulum.
Thus, cisternae are found in both the endoplasmic reticulum and Golgi body, making (c) Endoplasmic reticulum and Golgi body the correct answer.