First slide
Eukaryotic Cells
Question

A is the organelle having cisternae and B is the cell organelle having cristae. A and B are respectively 

Easy
Solution

Cisternae are flattened sac like structures associated with Golgi complex and Endoplasmic reticulum. Cristae are infoldings of inner membrane of mitochondrion involved in electron transport chain of aerobic respiration.

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