Mix Example-Cell: The Unit of Life Questions in English

(A) . Cristae are the infoldings of the inner mitochondrial membrane, which increase the surface area for cellular respiration. Thus, $A-II$.
$B$. Cisternae are the flattened, disc-shaped sacs that make up the Golgi apparatus. Thus, $B-IV$.
$C$. Thylakoids are the flattened, sac-like structures found within the stroma of chloroplasts, where light-dependent reactions occur. Thus, $C-I$.
$D$. Phospholipids are the primary structural components of the cell membrane (plasma membrane). Thus, $D-III$.
Therefore, the correct matching is $A-II, B-IV, C-I, D-III$.

(A) The endomembrane system is a group of membranes and organelles in eukaryotic cells that work together to modify, package, and transport lipids and proteins.
It consists of the endoplasmic reticulum $(ER)$, Golgi complex, lysosomes, and vacuoles.
These organelles are considered part of the endomembrane system because their functions are coordinated.
Organelles like mitochondria and chloroplasts are not part of the endomembrane system because their functions are not coordinated with the components of this system.