Final answer:
The Golgi apparatus appears as stacked flattened discs or semicircular deflated balloons when viewed under a transmission electron microscope.
Step-by-step explanation:
When viewed under a transmission electron microscope, the Golgi apparatus looks like stacked flattened discs, often compared to a stack of semicircular, deflated balloons or pancakes. The Golgi apparatus is an essential organelle found close to the nucleus of the cell, playing a crucial role in modifying, sorting, and packaging substances for secretion or use within the cell. It features a cis face, which receives vesicles containing products from the Rough Endoplasmic Reticulum (ER) and a trans face from which vesicles bearing the processed materials bud off.
The Golgi apparatus, when viewed under a transmission electron microscope, looks like a stack of flattened discs or pancakes. These discs are membranous and have two distinct sides. One side receives products in vesicles which are sorted through the apparatus and released from the opposite side after being repackaged into new vesicles.